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final chapter CCNA routing & switching V5.0

Chủ Nhật, 19 tháng 1, 2014
Final exam answers of routing & switching V5.0


(probably not complete)

What is the correct order for PDU encapsulation?
  • Frame Header-Network Header-Transport Header-Data-Frame Trailler

A PC is configured to obtain an IP address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?
  • This is a static map entry

Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
  • /64
  • /68

What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
  • It forwards the frame out of all ports except for the port at which the frame was received.

Which two statements correctly describe a router memory type and its contents?
  • RAM is volatile and stores the IP routing table.
  • ROM is nonvolatile and contains basic diagnostic software.

What is the auto-MDIX feature on a switch?
  • the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection

What is the purpose of the routing process?
  • to select the paths that are used to direct traffic to destination networks

What is the purpose of ICMP messages?
  • to provide feedback of IP packet transmissions

Open the PT activity. Perform the tasks in the activity instructions and then fill in the blank.
The Server0 message is
  • Winner

Refer to the exhibit. Which IP addressing scheme should be changed?
  • Site 2

Which subnet would include the address 192.168.1.96 as a usable host address?
  • 192.168.1.64/26

Which subnet would include the address 192.168.1.192 as a usable host address?
  • 192.168.1.128/25

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?
  • to interrupt the ping process

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses Telnet to connect to the switch, which password is needed to access user EXEC mode?
  • linevtyin

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses console port to connect to the switch, which password is needed to access user EXEC mode?
  • linecoin

Refer to the exhibit. What is the significance of the asterisk (*) in the exhibited output?
  • The asterisk designates which file system is the default file system.

When applied to a router, which command would help mitigate brute-force password attacks against the router?
  • login block-for 60 attempts 5 within 60

A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that?
  • 192.168.1.64/27
  • 192.168.1.96/28

Which field in an IPv4 packet header will typically stay the same during its transmission?
  • Destination Address

Refer to the exhibit.
The network administrator enters these commands into the R1 router: R1# copy running-config tftp
Address or name of remote host [ ]?
When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?
  • 192.168.11.252

What is the effect of configuring the ipv6 unicast-routing command on a router
  • to enable the router as an IPv6 router

Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
  • It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.

Which procedure is used to reduce the effect of crosstalk in copper cables?
  • twisting opposing circuit wire pairs together

What happens when part of an Internet radio transmission is not delivered to the destination?
  • The transmission continues without the missing portion.

Which address on a PC does not change, even if the PC is moved to a different network?
  • MAC address

Three bank employees are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?.
  • audio conference, financial transactions, web page

Which publicly available resources describe protocols, processes, and technologies for the Internet but do not give implementation details?
  • Request for Comments

Which three IP addresses are private ? (Choose three.)
  • 172.16.4.4
  • 10.1.1.1
  • 192.168.5.5

What is the purpose of the network security accounting function?
  • to keep track of the actions of a user

How does a Layer 3 switch differ from a Layer 2 switch?
  • An IP address can be assigned to a physical port of a Layer 3 switch. However, this is not supported in Layer 2 switches.

Which connection provides a secure CLI session with encryption to a Cisco switch?
  • an SSH connection

A network engineer is measuring the transfer of bits across the company backbone for a mission critical database application. The engineer notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
  • the amount of traffic that is currently crossing the network
  • the type of traffic that is crossing the network
  • number of network devices that the data is crossing

A host PC has just booted and is attempting to lease an address through DHCP. Which two messages will the client typically broadcast on the network? (Choose two.)
  • DHCPREQUEST
  • DHCPDISCOVER

A host PC has just booted and is attempting to lease an address through DHCP. Which message will the client broadcast first on the network?
  • DHCPDISCOVER

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
  • data link layer addressing
  • detection of errors through CRC calculations
  • delimiting groups of bits into frames

Refer to the exhibit. An administrator wants to change the name of a brand new switch, using the hostname command as shown (Switch(config)# hostname My Switch). What prompt will display after the command is issued?​
  • Switch(config)#​

Which type of wireless security generates dynamic encryption keys each time a client associates with an AP?
  • WPA

A particular website does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
  • ipconfig /displaydns

What is an important function of the physical layer of the OSI model? (Chaptr 4 exam)
  • It encodes frames into electrical, optical, or radio wave signals.

Match the phases to their correct stage in the router setup process. (Not all options are used.)
  • Stage 1 - perform the post
  • Stage 2 - load the bootstrap program
  • Stage 3 - Locate and load the Cisco IOS
  • Stage 4 - locate and load the configuration file

Match the description with the associated IOS mode. (Not all options are used.)
user EXEC mode
  • limited number of basic monitoring commands
  • the first entrance into the CLI of an IOS device
privileged EXEC mode
  • accessed by entering the enable command
  • identified by a prompt ending with the # character
global configuration mode
  • changes made affect the opperation of the device as a whole
  • accessed by entering the configure terminal command

Refer to the exhibit. A TCP segment from a server has been captured by Wireshark, which is running on a host. What acknowledgement number will the host return for the TCP segment that has been received?
  • 306

Match the IPv6 address to the IPv6 address type. (Not all options are used.)
  • Link-Local - FE80:056BA:FFEE:A0B4:47FF:FE36:532B and FE80::1
  • Multicast - FF02::2 and FF02::1:FF3A:25C9
  • Global Unicast - 2DD1:D88:10::12 and 2001:DB8:A1:0B:C78::1

What is a characteristic of the LLC sublayer?.
  • It places information in the frame that allows multiple Layer 3 protocols to use the same network interface and media.

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
  • VLAN 1

During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a _____ message
  • multicast

Which function is provided by TCP?
  • detection of missing packets

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which IPv6 address is assigned to the Serial0/0/0 interface on RT2?
  • 2001:db8:abc:5::1

A host is accessing a Web server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
  • regenerating data signals
  • providing a channel over which messages travel
  • notifying other devices when errors occur

In which default order will a router search for startup configuration information?
  • NVRAM, TFTP, setup mode

What two preconfigured settings that affect security are found on most new wireless routers? (Choose two.)
  • broadcast SSID
  • default administrator password

What will happen if the default gateway address is incorrectly configured on a host?
  • The host cannot communicate with hosts in other networks.

What is the purpose of having a converged network?
  • to reduce the cost of deploying and maintaining the communication infrastructure

Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
  • area C

After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
  • The new configuration will be loaded if the switch is restarted.

Which parameter does the router use to choose the path to the destination when there are multiple routes available?
  • the lower metric value that is associated with the destination network

Refer to the exhibit (PC0 and PC1 connected to S1, PC2 and PC3 connected to S2, S1 connected to S2). A ping to PC3 is issued from PC0, PC1, and PC2 in this exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port (port connecting S1 to S2)?
  • just PC0 and PC1 MAC addresses

During normal operation, from which location do most Cisco switches and routers run the IOS?
  • RAM

Which two components are necessary for a wireless client to be installed on a WLAN? (Choose two.)
  • wireless NIC
  • wireless client software

A technician uses the ping 127.0.0.1 command. What is the technician testing?
  • the TCP/IP stack on a network host

Which technology provides a solution to IPv4 address depletion by allowing multiple devices to share one public IP address?
  • NAT

A frame is transmitted from one networking device to another. Why does the receiving device check the FCS field in the frame?
  • to check the frame for possible transmission errors

What method is used to manage contention-based access on a wireless network?
  • CSMA/CA

Which three statements characterize the transport layer protocols? (Choose three.)
  • TCP and UDP port numbers are used by application layer protocols.
  • TCP uses windowing and sequencing to provide reliable transfer of data.
  • TCP is a connection-oriented protocol. UDP is a connectionless protocol.

Copper cables
  • horizontal cabling structure, desktop PCs in an enterprise office
Fiber optic
  • backbone cabling in an enterprise, long-haul networks
Wireless
  • guest access in a coffee shop
  • waiting rooms in a hospital

A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
  • DSL
Read more ...

final chapter of CCNA routing and switching V5.0

Chủ Nhật, 19 tháng 1, 2014
Final exam answers of routing & switching V5.0


(probably not complete)

What is the correct order for PDU encapsulation?
  • Frame Header-Network Header-Transport Header-Data-Frame Trailler

A PC is configured to obtain an IP address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?
  • This is a static map entry

Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
  • /64
  • /68

What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
  • It forwards the frame out of all ports except for the port at which the frame was received.

Which two statements correctly describe a router memory type and its contents?
  • RAM is volatile and stores the IP routing table.
  • ROM is nonvolatile and contains basic diagnostic software.

What is the auto-MDIX feature on a switch?
  • the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection

What is the purpose of the routing process?
  • to select the paths that are used to direct traffic to destination networks

What is the purpose of ICMP messages?
  • to provide feedback of IP packet transmissions

Open the PT activity. Perform the tasks in the activity instructions and then fill in the blank.
The Server0 message is
  • Winner

Refer to the exhibit. Which IP addressing scheme should be changed?
  • Site 2

Which subnet would include the address 192.168.1.96 as a usable host address?
  • 192.168.1.64/26

Which subnet would include the address 192.168.1.192 as a usable host address?
  • 192.168.1.128/25

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?
  • to interrupt the ping process

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses Telnet to connect to the switch, which password is needed to access user EXEC mode?
  • linevtyin

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses console port to connect to the switch, which password is needed to access user EXEC mode?
  • linecoin

Refer to the exhibit. What is the significance of the asterisk (*) in the exhibited output?
  • The asterisk designates which file system is the default file system.

When applied to a router, which command would help mitigate brute-force password attacks against the router?
  • login block-for 60 attempts 5 within 60

A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that?
  • 192.168.1.64/27
  • 192.168.1.96/28

Which field in an IPv4 packet header will typically stay the same during its transmission?
  • Destination Address

Refer to the exhibit.
The network administrator enters these commands into the R1 router: R1# copy running-config tftp
Address or name of remote host [ ]?
When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?
  • 192.168.11.252

What is the effect of configuring the ipv6 unicast-routing command on a router
  • to enable the router as an IPv6 router

Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
  • It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.

Which procedure is used to reduce the effect of crosstalk in copper cables?
  • twisting opposing circuit wire pairs together

What happens when part of an Internet radio transmission is not delivered to the destination?
  • The transmission continues without the missing portion.

Which address on a PC does not change, even if the PC is moved to a different network?
  • MAC address

Three bank employees are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?.
  • audio conference, financial transactions, web page

Which publicly available resources describe protocols, processes, and technologies for the Internet but do not give implementation details?
  • Request for Comments

Which three IP addresses are private ? (Choose three.)
  • 172.16.4.4
  • 10.1.1.1
  • 192.168.5.5

What is the purpose of the network security accounting function?
  • to keep track of the actions of a user

How does a Layer 3 switch differ from a Layer 2 switch?
  • An IP address can be assigned to a physical port of a Layer 3 switch. However, this is not supported in Layer 2 switches.

Which connection provides a secure CLI session with encryption to a Cisco switch?
  • an SSH connection

A network engineer is measuring the transfer of bits across the company backbone for a mission critical database application. The engineer notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
  • the amount of traffic that is currently crossing the network
  • the type of traffic that is crossing the network
  • number of network devices that the data is crossing

A host PC has just booted and is attempting to lease an address through DHCP. Which two messages will the client typically broadcast on the network? (Choose two.)
  • DHCPREQUEST
  • DHCPDISCOVER

A host PC has just booted and is attempting to lease an address through DHCP. Which message will the client broadcast first on the network?
  • DHCPDISCOVER

What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
  • data link layer addressing
  • detection of errors through CRC calculations
  • delimiting groups of bits into frames

Refer to the exhibit. An administrator wants to change the name of a brand new switch, using the hostname command as shown (Switch(config)# hostname My Switch). What prompt will display after the command is issued?​
  • Switch(config)#​

Which type of wireless security generates dynamic encryption keys each time a client associates with an AP?
  • WPA

A particular website does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
  • ipconfig /displaydns

What is an important function of the physical layer of the OSI model? (Chaptr 4 exam)
  • It encodes frames into electrical, optical, or radio wave signals.

Match the phases to their correct stage in the router setup process. (Not all options are used.)
  • Stage 1 - perform the post
  • Stage 2 - load the bootstrap program
  • Stage 3 - Locate and load the Cisco IOS
  • Stage 4 - locate and load the configuration file

Match the description with the associated IOS mode. (Not all options are used.)
user EXEC mode
  • limited number of basic monitoring commands
  • the first entrance into the CLI of an IOS device
privileged EXEC mode
  • accessed by entering the enable command
  • identified by a prompt ending with the # character
global configuration mode
  • changes made affect the opperation of the device as a whole
  • accessed by entering the configure terminal command

Refer to the exhibit. A TCP segment from a server has been captured by Wireshark, which is running on a host. What acknowledgement number will the host return for the TCP segment that has been received?
  • 306

Match the IPv6 address to the IPv6 address type. (Not all options are used.)
  • Link-Local - FE80:056BA:FFEE:A0B4:47FF:FE36:532B and FE80::1
  • Multicast - FF02::2 and FF02::1:FF3A:25C9
  • Global Unicast - 2DD1:D88:10::12 and 2001:DB8:A1:0B:C78::1

What is a characteristic of the LLC sublayer?.
  • It places information in the frame that allows multiple Layer 3 protocols to use the same network interface and media.

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
  • VLAN 1

During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a _____ message
  • multicast

Which function is provided by TCP?
  • detection of missing packets

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which IPv6 address is assigned to the Serial0/0/0 interface on RT2?
  • 2001:db8:abc:5::1

A host is accessing a Web server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
  • regenerating data signals
  • providing a channel over which messages travel
  • notifying other devices when errors occur

In which default order will a router search for startup configuration information?
  • NVRAM, TFTP, setup mode

What two preconfigured settings that affect security are found on most new wireless routers? (Choose two.)
  • broadcast SSID
  • default administrator password

What will happen if the default gateway address is incorrectly configured on a host?
  • The host cannot communicate with hosts in other networks.

What is the purpose of having a converged network?
  • to reduce the cost of deploying and maintaining the communication infrastructure

Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
  • area C

After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
  • The new configuration will be loaded if the switch is restarted.

Which parameter does the router use to choose the path to the destination when there are multiple routes available?
  • the lower metric value that is associated with the destination network

Refer to the exhibit (PC0 and PC1 connected to S1, PC2 and PC3 connected to S2, S1 connected to S2). A ping to PC3 is issued from PC0, PC1, and PC2 in this exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port (port connecting S1 to S2)?
  • just PC0 and PC1 MAC addresses

During normal operation, from which location do most Cisco switches and routers run the IOS?
  • RAM

Which two components are necessary for a wireless client to be installed on a WLAN? (Choose two.)
  • wireless NIC
  • wireless client software

A technician uses the ping 127.0.0.1 command. What is the technician testing?
  • the TCP/IP stack on a network host

Which technology provides a solution to IPv4 address depletion by allowing multiple devices to share one public IP address?
  • NAT

A frame is transmitted from one networking device to another. Why does the receiving device check the FCS field in the frame?
  • to check the frame for possible transmission errors

What method is used to manage contention-based access on a wireless network?
  • CSMA/CA

Which three statements characterize the transport layer protocols? (Choose three.)
  • TCP and UDP port numbers are used by application layer protocols.
  • TCP uses windowing and sequencing to provide reliable transfer of data.
  • TCP is a connection-oriented protocol. UDP is a connectionless protocol.

Copper cables
  • horizontal cabling structure, desktop PCs in an enterprise office
Fiber optic
  • backbone cabling in an enterprise, long-haul networks
Wireless
  • guest access in a coffee shop
  • waiting rooms in a hospital

A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
  • DSL
Read more ...

chapter 10, routing and switching 2013 /2014, CCNA Version 5.0

Chủ Nhật, 19 tháng 1, 2014
chapter 10 routing & switching V5.0


Which phrase describes an FTP daemon?
  • a program that is running on an FTP server

Which two actions are taken by SMTP if the destination email server is busy when email messages are sent? (Choose two.)
  • SMTP periodically checks the queue for messages and attempts to send them again
  • SMTP tries to send the messages at a later time

When would it be more efficient to use SMB to transfer files instead of FTP?
  • when downloading large numbers of files from the same server

What is an example of network communication that uses the client-server model?
  • A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

What is true about the Server Message Block protocol?
  • Clients establish a long term connection to servers.

Refer to the exhibit. What command was used to resolve a given host name by querying the name servers?
  • nslookup

Which DNS server in the DNS hierarchy would be considered authoritative for the domain name records of a company named netacad?
  • netacad.com

A user accessed the game site www.nogamename.com last week. The night before the user accesses the game site again, the site administrator changes the site IP address. What will be the consequence of that action for the user?
  • The user will access the site without problems.

Match the purpose with its DHCP message type
  • DHCPREQUEST - a message that is used to identify the explicit server and lease offer to accept
  • DHCPDISCOVER - a message that is used to locate any available DHCP server on the network
  • DHCPOFFER - a message that is used to suggest a lease to a client
  • DHCPACK - a message that is used to acknowledge that the lease is successful

What are two characteristics of peer-to-peer networks? (Choose two.)
  • resource sharing without a dedicated server
  • decentralized resources

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)
  • session layer
  • application layer
  • presentation layer

What is an advantage for small organizations of adopting IMAP instead of POP?
  • Messages are kept in the mail servers until the client manually deletes them.

Which application layer protocol uses message types such as GET, PUT, and POST?
  • HTTP

A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)
  • DHCPDISCOVER
  • DHCPREQUEST

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which PC or PCs are sending FTP packets to the server?
  • PC_2

Which three statements describe a DHCP Discover message? (Choose three.)
  • The destination IP address is 255.255.255.255.
  • The message comes from a client seeking an IP address.
  • All hosts receive the message, but only a DHCP server replies.

Which two tasks are functions of the presentation layer? (Choose two.)
  • Compression
  • Encryption

Fill in the blank.
What is the acronym for the protocol that is used when securely communicating with a web server?
  • HTTPS

Select three protocols that operate at the Application Layer of the OSI model. (Choose three.)
  • POP3
  • DHCP
  • FTP

Match a statement to the related network model

Peer-to-peer network
  • no dedicated server required
  • client and server roles are set on a per request basis
Peer-to-peer application
  • a background service is required
  • requires a specific user interface

A manufacturing company subscribes to certain hosted services from their ISP. The services required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)
  • FTP
  • HTTP
  • SMTP

Match the DNS record type to the corresponding description
  • A - end device address
  • NS - authoritative name server
  • CNAME - canonical name
  • MX - mail exchange record
Read more ...

chapter 9 CCNA V5.0 routing and switching 2013 /2014

Chủ Nhật, 19 tháng 1, 2014
chapter 9 routing & switching V5.0


Refer to the exhibit. A computer that is configured with the IPv6 address as shown in the exhibit is unable to access the internet. What is the problem?
  • The gateway address is in the wrong subnet.

When subnetting a /64 IPv6 network prefix, which is the preferred new prefix?
  • /72

Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
  • /64
  • /68

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What issue is causing Host A to be unable to communicate with Host B
  • Host A and host B are on overlapping subnets

Consider the following range of addresses:
2001:0DB8:BC15:00A0:0000::
2001:0DB8:BC15:00A1:0000::
2001:0DB8:BC15:00A2:0000::
...
2001:0DB8:BC15:00AF:0000::
The prefix for the range of addresses is __________________
  • /60

Fill in the blank.
In dotted decimal notation, the subnet mask_________ will accommodate 500 hosts per subnet.
  • 255.255.254.0

Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many addresses are wasted in total by subnetting each network with a subnet mask of 255.255.255.224?
  • 72

In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?
  • /25

Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
  • It eliminates most address configuration errors
  • It reduces the burden on network support staff

Fill in the blank.
In dotted decimal notation, the IP address_______ is the last host address for the network 172.25.0.64/26.
  • 172.25.0.126

When developing an IP addressing scheme for an enterprise network, which devices are recommended to be grouped into their own subnet or logical addressing group?
  • hosts accessible from the internet

Refer to the exhibit. How many broadcast domains are there?
  • 4

How many usable host addresses are there in the subnet 192.168.1.32/27?
  • 30

A nibble consists of _______ bits
  • four

How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
  • 1022

A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
  • predictable static IP addresses for easier identification

How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?
  • three

Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?
  • IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33

What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
  • 2001:DB8:BC15:A::0

Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?
  • 255.255.255.128

A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
  • 192.168.1.64/27
  • 192.168.1.96/28

A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many host addresses will this subnet provide?​
  • 6

Refer to the exhibit. Match the correct IP address and prefix that will satisfy the usable host addressing requirements.
  • Network A needs to use 192.168.0.0 /25 which yields 128 host addresses.
  • Network B needs to use 192.168.0.128 /26 which yields 64 host addresses.
  • Network C needs to use 192.168.0.192 /27 which yields 32 host addresses.
  • Network D needs to use 192.168.0.224 /30 which yields 4 host addresses.

Match the subnetwork to a host address that would be included within the subnetwork
  • Subnet 192.168.1.32/27 - 192.168.1.48
  • Subnet 192.168.1.64/27 - 192.168.1.68
  • Subnet 192.168.1.96/27 - 192.168.1.121
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chapter 8 CCNA routing and switching 2013 /2014. V5.0

Chủ Nhật, 19 tháng 1, 2014
 chapter 8 routing & switching V5.0


What is indicated by a successful ping to the ::1 IPv6 address?
  • IP is properly installed on the host

Which two ICMP messages are used by both IPv4 and IPv6 protocols? (Choose two.)​
  • route redirection
  • protocol unreachable

What are three parts of an IPv6 global unicast address? (Choose three.)
  • 1. a subnet ID that is used to identify networks inside of the local enterprise site
  • 2. an interface ID that is used to identify the local host on the network
  • 3. a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP

When an IPv6 enabled host needs to discover the MAC address of an intended IPv6 destination, which destination address is used by the source host in the NS message?
  • solicited-node multicast address

Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)
  • IPv4 addresses are 32 bits in length.
  • IPv6 addresses are represented by hexadecimal numbers.

A DHCP server is used to assign IP addresses dynamically to the hosts on a network. The address pool is configured with 192.168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts?
  • 251

Which two things can be determined by using the ping command? (Choose two.)
  • whether or not the destination device is reachable through the network
  • the average time it takes a packet to reach the destination and for the response to return to the source

The decimal equivalent of the binary number 10010101 is
  • 149

Match each IPv4 address to the appropriate address category
Host Address
  • 192.168.100.161/25 
  • 203.0.113.100/24 
  • 10.0.50.10/30 
Network Address
  • 192.168.1.80/29 
  • 172.110.12.64/28 
  • 10.10.10.128/25
Broadcast Address
  • 10.0.0.159/27 
  • 192.168.1.191/26

How many bits are in an IPv4 address?
  • 32

An IPv6 enabled device sends a data packet with the destination address of FF02::1. What is the target of this packet?
  • all IPv6 enabled nodes on the local link

Fill in the blank.
What is the decimal equivalent of the hex number 0x3F?
  • 63

Which network migration technique encapsulates IPv6 packets inside IPv4 packets to carry them over IPv4 network infrastructures?
  • tunneling

What are two types of IPv6 unicast addresses? (Choose two.)
  • loopback
  • link-local

What two statements describe characteristics of Layer 3 broadcasts? (Choose two.)
  • Routers create broadcast domains
  • A limited broadcast packet has a destination IP address of 255.255.255.255

When will a router drop a traceroute packet?
  • when the value in the TTL field reaches zero

Match each description with an appropriate IP address
  • a legacy class A address 64.100.3.5
  • a legacy class B address 128.107.5.1
  • a legacy class C address 192.31.18.123
  • a legacy class D address 224.2.6.255
  • an invalid IPv4 address 198.256.2.6

When a Cisco router is being moved from an IPv4 network to a complete IPv6 environment, which series of commands would correctly enable IPv6 forwarding and interface addressing?
Router# configure terminal
Router(config)# interface fastethernet 0/0
Router(config-if)# ipv6 address 2001:db8:bced:1::9/64
Router(config-if)# no shutdown
Router(config-if)# exit
Router(config)# ipv6 unicast-routing

Which two parts are components of an IPv4 address? (Choose two.)
  • network portion and host portion

Which IPv6 address is most compressed for the full FE80:0:0:0:2AA:FF:FE9A:4CA3 address?​
  • FE80::2AA:FF:FE9A:4CA3

Which message is displayed on the web server?
  • Correct configuration!

Match each description with an appropriate IP address
  • a link local 169.254.1.5
  • a TEST 192.0.2.123
  • an experimental 240.2.5.255
  • a private 172.19.20.5
  • a loopback 127.0.0.1

A message is sent to all hosts on a remote network. Which type of message is it?
  • directed broadcast

What is the prefix length notation for the subnet mask 255.255.255.224?
  • /27
Read more ...

chapter 7 CCNA routing and switching V5.0 / 2013-2014

Chủ Nhật, 19 tháng 1, 2014
chapter 7 routing & switching V5.0


What is the complete range of TCP and UDP well-known ports?
  • 0 to 1023

A host device sends a data packet to a web server via the HTTP protocol. What is used by the transport layer to pass the data stream to the proper application on the server?
  • destination port number

Fill in the blank using a number. A total of ____ messages are exchanged during the TCP session termination process between the client and the server.
  • four

Which scenario describes a function provided by the transport layer?
A student has two web browser windows open in order to access two web sites.
  • The transport layer ensures the correct web page is delivered to the correct browser window

Which factor determines TCP window size?
  • the amount of data the destination can process at one time

What happens if the first packet of a TFTP transfer is lost?
  • The TFTP application will retry the request if a reply is not received.

What is a beneficial feature of the UDP transport protocol?
  • fewer delays in transmission

Compared to UDP, what factor causes additional network overhead for TCP communication?
  • network traffic that is caused by retransmissions

What is a socket?
  • the combination of a source IP address and port number or a destination IP address and port number

Which two TCP header fields are used to confirm receipt of data?
  • Sequence number
  • Acknowledgement number

During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?
  • the next byte that the destination expects to receive

During a TCP session, the ____ field is used by the client to request communication with the server
  • SYN, SYN-ACK, and ACK
     

A host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth?
  • multiplexing

A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?
  • 10 segments

A technician wishes to use TFTP to transfer a large file from a file server to a remote router. Which statement is correct about this scenario?
  • The file is segmented and then reassembled in the correct order at the destination, if necessary, by the upper-layer protocol..

What does a client do when it has UDP datagrams to send?
  • It just sends the datagrams

Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)
  • SYN
  • ACK

What does a client application select for a TCP or UDP source port number?
  • a random value in the range of the registered ports

Which transport layer feature is used to guarantee session establishment?
  • TCP 3-way handshake

Match the characteristic to the protocol category
TCP:
  • window size
  • 3-way handshake
UDP:
  • best for VoIP
  • connectionless
Both UPD and TCP:
  • port number
  • checksum

Match each application to its connectionless or connection-oriented protocol

TCP:
  • HTTP
  • FTP
  • Telnet
UDP:
  • DHCP
  • TFTP

Refers to the exhibit. Consider a datagram that originates on the PC and that is destined for the webserver.
Source IP address
  • 192.168.1.2
Destination IP address
  • 192.168.2.2
Source port number
  • 2578
Destination port number
  • 80
Read more ...

chapter 6 CCNA V5.0 routing and switching 2013 /2014

Chủ Nhật, 19 tháng 1, 2014
chapter 6 routing & switching V5.0


During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?
  • switch the packet to the directly connected interface

How do hosts ensure that their packets are directed to the correct network destination?
  • They have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route.

When would the Cisco IOS image held in ROM be used to boot the router?
  • when the full IOS cannot be found

A packet leaving PC-1 has to traverse____ hops to reach PC-4.​
  • three

Does the router have enough RAM and flash memory to support the new IOS?
  • The router has enough RAM and flash memory for the IOS upgrade

A technician is configuring a router that is actively running on the network. Suddenly, power to the router is lost. If the technician has not saved the configuration, which two types of information will be lost? (Choose two.)
  • ARP cache
  • routing table

Which three commands are used to set up a password for a person who attaches a cable to a new router so that an initial configuration can be performed? (Choose three.)
  • line console 0
  • login
  • password cisco

Why is NAT not needed in IPv6?​
  • Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large

After troubleshooting a router, the network administrator wants to save the router configuration so that it will be used automatically the next time that the router reboots. What command should be issued?
  • copy running-config startup-config

What is a service provided by the Flow Label field of the IPv6 header?
  • It informs network devices to maintain the same path for real-time application packets

When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?
  • upper-layer connection-oriented protocols

Fill in the blank. In a router,_____is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.
  • ROM

Which two commands can be used on a Windows host to display the routing table? (Choose two.)
  • route print
  • netstat -r

A technician is manually configuring a computer with the necessary IP parameters to communicate over the corporate network. The computer already has an IP address, a subnet mask, and a DNS server. What else has to be configured for Internet access?
  • the default gateway address

Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status?
  • show ip interface brief

Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up? (Choose two.)
  • IOS image file
  • startup configuration

Which two interfaces will allow access via the VTY lines to configure the router? (Choose two.)
  • LAN interface
  • WAN interface

Which IPv4 header field is responsible for defining the priority of the packet?
  • differentiated services

A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
  • The packet will be sent directly to the destination host

Match the configuration mode with the command that is available in that mode.
  • enable - R1>
  • login - R1(config-line)#
  • copy running-config startup-config - R1#
  • interface fastethernet 0/0 command - R1(config)#
The enable command is entered at the R1> prompt. The login command is entered at the R1(config-line)# prompt. The copy running-config startup-config command is entered at the R1# prompt. The interface fastethernet 0/0 command is entered at the R1(config)# prompt

Which statement about router interfaces is true?
  • A configured and activated router interface must be connected to another device in order to operate

Match field names to the header where they would be found
  • IPv4: Total Length, Flags
  • IPv6: Traffic Class, Flow Label

Refer to the exhibit. Match the packets with their destination IP address to the existing interfaces on the router.
  • Packets with a destination of 172.17.6.15 are forwarded through Fa0/0. 
  • Packets with a destination of 172.17.10.5 are forwarded through Fa1/1.
  • Packets with a destination of 172.17.12.10 are forwarded through Fa1/0.
  • Packets with a destination of 172.17.14.8 are forwarded through Fa0/1.
Because network 172.17.8.0 has no entry in the routing table, it will take the gateway of last resort, which means that packets with a destination of 172.17.8.20 are forwarded through Serial0/0/0. Because a gateway of last resort exists, no packets will be dropped
Read more ...