CISCO 4 Chapter 7

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CISCO 4 Chapter 7 - Quiz


WAN


Questions and Answers
  • 1. 

    ccna 4 chapter 7 Refer to the exhibit. Traffic exiting R1 is failing translation. What part of the configuration is most likely incorrect?

    • A.

      Ip nat pool statement

    • B.

      Access-list statement

    • C.

      Ip nat inside is on the wrong interface

    • D.

      Interface s0/0/2 should be a private IP address

    Correct Answer
    B. Access-list statement
    Explanation
    The most likely incorrect part of the configuration is the access-list statement. This is because the access-list statement is responsible for defining which traffic should be translated by the NAT (Network Address Translation) process. If the access-list statement is incorrect or missing, the NAT process may not be applied to the desired traffic, causing the traffic exiting R1 to fail translation.

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  • 2. 

    Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?

    • A.

      Defines which addresses can be translated

    • B.

      Defines which addresses are allowed into the router

    • C.

      Defines which addresses are assigned to a NAT pool

    • D.

      Defines which addresses are allowed out of the router

    Correct Answer
    A. Defines which addresses can be translated
    Explanation
    The command marked with an arrow in the partial configuration output of a Cisco broadband router is used to define which addresses can be translated. This command specifies the range of IP addresses that can be translated using Network Address Translation (NAT). It allows the router to determine which addresses from the internal network can be translated to the external network, providing connectivity and security for the network.

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  • 3. 

    How many bits of an IPv6 address are used to identify the interface ID?

    • A.

      32

    • B.

      48

    • C.

      64

    • D.

      128

    Correct Answer
    C. 64
    Explanation
    In an IPv6 address, the interface ID is used to identify a specific network interface. The interface ID is 64 bits long, which means that it requires 64 bits of the IPv6 address to uniquely identify the interface. Therefore, the correct answer is 64.

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  • 4. 

    ccna 4 chapter 7 answers Refer to the exhibit. How many IPv6 broadcast domains exist in this topology?

    • A.

      0

    • B.

      1

    • C.

      2

    • D.

      3

    • E.

      4

    Correct Answer
    A. 0
    Explanation
    In this topology, there are no IPv6 broadcast domains. A broadcast domain is a logical division of a computer network, where all devices can reach each other by broadcast at the data link layer. However, in IPv6, broadcast addresses are not used. Instead, multicast addresses are used to reach multiple devices. Therefore, there are no IPv6 broadcast domains in this topology.

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  • 5. 

    ccna 4 chapter 7 Refer to the exhibit. Which two addresses could be assigned to traffic leaving S0 as a result of the statement ip nat pool Tampa 179.9.8.96 179.9.8.111 netmask 255.255.255.240? (Choose two.)

    • A.

      10.0.0.125

    • B.

      179.9.8.95

    • C.

      179.9.8.98

    • D.

      179.9.8.101

    • E.

      179.9.8.112

    Correct Answer(s)
    C. 179.9.8.98
    D. 179.9.8.101
    Explanation
    The given IP NAT pool statement specifies the range of IP addresses that can be assigned to traffic leaving S0. The statement "ip nat pool Tampa 179.9.8.96 179.9.8.111 netmask 255.255.255.240" indicates that the pool includes the IP addresses from 179.9.8.96 to 179.9.8.111, with a subnet mask of 255.255.255.240. Therefore, the two addresses that could be assigned to traffic leaving S0 are 179.9.8.98 and 179.9.8.101.

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  • 6. 

    Refer to the exhibit. A network technician determines DHCP clients are not working properly. The clients are receiving IP configuration information from a DHCP server configured on the router but cannot access the Internet. From the output in the graphic, what is the most likely problem?

    • A.

      The DHCP server service is not enabled.

    • B.

      The inside interface for DCHP is not defined.

    • C.

      The DHCP pool is not bound to the interface.

    • D.

      The pool does not have a default router defined for the clients.

    • E.

      All the host addresses have been excluded from the DHCP pool.

    Correct Answer
    D. The pool does not have a default router defined for the clients.
    Explanation
    The most likely problem is that the pool does not have a default router defined for the clients. This means that the DHCP clients are not being provided with the necessary information to access the Internet. Without a default router, the clients do not know where to send their network traffic.

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  • 7. 

    Your organization is issued the IPv6 prefix of 2001:0000:130F::/48 by your service provider. With this prefix, how many bits are available for your organization to create subnetworks?

    • A.

      8

    • B.

      16

    • C.

      80

    • D.

      128

    Correct Answer
    B. 16
    Explanation
    The given IPv6 prefix is 2001:0000:130F::/48. In IPv6, each hex digit represents 4 bits. Therefore, the prefix has a length of 48 * 4 = 192 bits. The organization is required to create subnetworks using this prefix. To determine the number of bits available for subnetworks, we subtract the length of the prefix from the total number of bits in an IPv6 address. An IPv6 address has a length of 128 bits. Therefore, the number of bits available for subnetworks is 128 - 192 = -64 bits. However, the number of available bits cannot be negative, so the correct answer is 16 bits.

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  • 8. 

    ccna 4 chapter 7 Refer to the exhibit. IPv6 address 2006:1::1/64 eui-64 has been configured on the router FastEthernet0/0 interface. Which statement accurately describes the EUI-64 identifier configuration?

    • A.

      It will randomly generate a 64 bit interface ID.

    • B.

      It will assign an address from the pool of IPv6 private addresses to the interface.

    • C.

      It will assign only the registry prefix of the IPv6 Global Unicast address to the interface.

    • D.

      The configuration will derive the interface portion of the IPv6 address from the MAC address of the interface.

    Correct Answer
    D. The configuration will derive the interface portion of the IPv6 address from the MAC address of the interface.
    Explanation
    The EUI-64 identifier configuration will derive the interface portion of the IPv6 address from the MAC address of the interface. This means that the last 64 bits of the IPv6 address will be based on the MAC address of the interface, providing a unique identifier for the interface. This allows for automatic address configuration without the need for manual assignment or DHCP.

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  • 9. 

    What is true regarding the differences between NAT and PAT?

    • A.

      PAT uses the word “overload” at the end of the access-list statement to share a single registered address.

    • B.

      Static NAT allows an unregistered address to map to multiple registered addresses.

    • C.

      Dynamic NAT allows hosts to receive the same global address each time external access is required.

    • D.

      PAT uses unique source port numbers to distinguish between translations.

    Correct Answer
    D. PAT uses unique source port numbers to distinguish between translations.
    Explanation
    Port Address Translation (PAT) is a type of Network Address Translation (NAT) that allows multiple devices on a private network to share a single public IP address. PAT uses unique source port numbers to distinguish between translations, which means that each device on the private network will have a different source port number assigned to it when communicating with the public network. This allows the router to keep track of which device the incoming packets belong to and properly forward the responses to the correct device.

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  • 10. 

    ccna 4 chapter 7 Refer to the exhibit. The FTP server has an RFC 1918 private address. Users on the Internet need to connect to the FTP server on the Fa0/0 LAN of R1. Which three configurations must be completed on R1? (Choose three.)

    • A.

      Dynamic NAT

    • B.

      NAT with overloading

    • C.

      Open port 20

    • D.

      Open port 21

    • E.

      Open port 23

    • F.

      NAT with port forwarding

    Correct Answer(s)
    C. Open port 20
    D. Open port 21
    F. NAT with port forwarding
    Explanation
    To allow users on the Internet to connect to the FTP server on the Fa0/0 LAN of R1, the following configurations must be completed on R1:
    1. Open port 20: Port 20 is used for FTP data transfer.
    2. Open port 21: Port 21 is used for FTP control commands.
    3. NAT with port forwarding: This is required to forward incoming FTP traffic from the Internet to the private IP address of the FTP server.

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  • 11. 

    ccna 4 chapter 7 Refer to the exhibit. On the basis of the configuration shown, how should the pool of the excluded addresses be assigned to key hosts on the network, such as router interfaces, printers, and servers?

    • A.

      The addresses are statically assigned by the network administrator.

    • B.

      The DHCP server dynamically assigns the addresses.

    • C.

      The addresses must be listed under the DHCP pool of addresses before they are available for static assignment.

    • D.

      The addresses must be listed under the DHCP pool of addresses before they are available for dynamic assignment.

    Correct Answer
    A. The addresses are statically assigned by the network administrator.
    Explanation
    The given configuration shows that the addresses in the pool of excluded addresses are statically assigned by the network administrator. This means that the network administrator manually assigns these addresses to key hosts on the network such as router interfaces, printers, and servers. The DHCP server does not dynamically assign these addresses, and they do not need to be listed under the DHCP pool of addresses for either static or dynamic assignment.

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  • 12. 

    ccna 4 chapter 7 answers Refer to the exhibit. A technician used SDM to enter the NAT configuration for a Cisco router. Which statement correctly describes the result of the configuration?

    • A.

      A user on the inside sees web traffic coming from 192.168.1.3 using port 8080.

    • B.

      The address 172.16.1.1 is translated into an address from the pool beginning with 192.168.1.3.

    • C.

      A user on the outside network sees a request addressed from 192.168.1.3 using port 80.

    • D.

      A user on the outside must address traffic to port 8080 to reach the address 172.16.1.1.

    Correct Answer
    C. A user on the outside network sees a request addressed from 192.168.1.3 using port 80.
    Explanation
    The NAT configuration in the exhibit is performing Port Address Translation (PAT), also known as NAT overload. This means that multiple internal IP addresses are being translated to a single external IP address. In this case, the address 172.16.1.1 is translated to an address from the pool beginning with 192.168.1.3. When a user on the outside network sees a request addressed from 192.168.1.3 using port 80, it means that the internal address 172.16.1.1 is being translated to 192.168.1.3 and the port number is also being translated to port 80.

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  • 13. 

    ccna 4 chapter 7 Refer to the exhibit. According to the output, how many addresses have been successfully assigned or renewed by this DHCP server?

    • A.

      1

    • B.

      6

    • C.

      7

    • D.

      8

    • E.

      9

    Correct Answer
    D. 8
    Explanation
    According to the exhibit, the DHCP server has successfully assigned or renewed 8 addresses.

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  • 14. 

    What are two benefits of NAT? (Choose two.)

    • A.

      It saves public IP addresses.

    • B.

      It adds a degree of privacy and security to a network.

    • C.

      It increases routing performance.

    • D.

      It makes troubleshooting routing issues easier.

    • E.

      It makes tunneling with IPsec less complicated.

    Correct Answer(s)
    A. It saves public IP addresses.
    B. It adds a degree of privacy and security to a network.
    Explanation
    NAT (Network Address Translation) provides two benefits. Firstly, it saves public IP addresses by allowing multiple devices on a private network to share a single public IP address. This conserves the limited pool of public IP addresses available. Secondly, NAT adds a degree of privacy and security to a network by hiding the internal IP addresses of devices from the external network. This helps to prevent direct access to devices on the internal network and adds a layer of protection against potential attacks.

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  • 15. 

    ccna 4 chapter 7 Refer to the exhibit. R1 is performing NAT for the 10.1.1.0/24 network, and R2 is performing NAT for the 192.168.1.2/24 network. What would be valid destination IP address for HostA to put in its IP header when communicating with the web server?

    • A.

      10.1.1.1

    • B.

      172.30.20.2

    • C.

      192.168.1.2

    • D.

      255.255.255.255

    Correct Answer
    B. 172.30.20.2
    Explanation
    The valid destination IP address for HostA to put in its IP header when communicating with the web server would be 172.30.20.2. This is because R2 is performing NAT for the 192.168.1.2/24 network, and the web server is located on this network. Therefore, HostA needs to use the IP address of the web server (172.30.20.2) as the destination IP address in its IP header in order to communicate with it.

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  • 16. 

    ccna 4 chapter 7 Refer to the exhibit. Which two statements about the configuration are true? (Choose two.)

    • A.

      Traffic from the 10.1.1.0 network will be translated.

    • B.

      Traffic from the 209.165.200.0 network will be translated.

    • C.

      Permitted traffic gets translated to a single inside global IP address.

    • D.

      A pool of inside global IP addresses from the 10.1.1.0 network will be used for translation.

    • E.

      External users from the 209.165.200.0 network can reach private addresses on the 10.1.1.0 and 10.1.2.0 networks.

    Correct Answer(s)
    A. Traffic from the 10.1.1.0 network will be translated.
    C. Permitted traffic gets translated to a single inside global IP address.
    Explanation
    The first statement is true because the configuration includes the command "ip nat inside source list 1 pool NATPOOL overload", which specifies that traffic from the 10.1.1.0 network will be translated.
    The third statement is also true because the configuration includes the command "ip nat inside source list 1 pool NATPOOL overload", which specifies that permitted traffic will be translated to a single inside global IP address.

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  • 17. 

    What type of NAT should a network administrator use to ensure that a web server on the inside network is always available to the outside network?

    • A.

      NAT overload

    • B.

      Static NAT

    • C.

      dynamic NAT

    • D.

      PAT

    Correct Answer
    B. Static NAT
    Explanation
    A network administrator should use static NAT to ensure that a web server on the inside network is always available to the outside network. Static NAT maps a single private IP address to a single public IP address, allowing for consistent and permanent translation. This means that the web server will always have the same public IP address, making it easily accessible to the outside network.

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  • 18. 

    ccna 4 chapter 7 Refer to the exhibit. Which address or addresses represent the inside global address?

    • A.

      10.1.1.2

    • B.

      192.168.0.100

    • C.

      209.165.20.25

    • D.

      Any address in the 10.1.1.0 network

    Correct Answer
    C. 209.165.20.25
    Explanation
    The inside global address refers to the IP address that is used on the outside network to represent the internal network. In this case, the inside global address is 209.165.20.25, as it is the IP address that is used to represent the internal network on the outside network.

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  • 19. 

    A technician has been told by a supervisor to always clear any dynamic translations before attempting to troubleshoot a failed NAT connection. Why has the supervisor issued these instructions?

    • A.

      The supervisor wants to clear any confidential information that may be seen by the technician.

    • B.

      Because entries can be cached for long periods of time, the supervisor wants to prevent decisions being made based on old data.

    • C.

      The translation table may be full and is unable to make new translations until space is available.

    • D.

      Clearing the translations causes the starting configuration to be reread and may correct translation problems that have occurred.

    Correct Answer
    B. Because entries can be cached for long periods of time, the supervisor wants to prevent decisions being made based on old data.
    Explanation
    The supervisor has instructed the technician to always clear any dynamic translations before troubleshooting a failed NAT connection because entries can be cached for long periods of time. By clearing the translations, the supervisor wants to prevent decisions being made based on old data, ensuring that the troubleshooting process is based on the most up-to-date information.

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  • 20. 

    A network administrator wants to connect two IPv6 islands. The easiest way is through a public network that uses only IPv4 equipment. What simple solution solves the problem?

    • A.

      Replace the devices on the public network with devices that support IPv6.

    • B.

      Configure RIPng on the border routers of each IPv6 island.

    • C.

      Configure the routers to take advantage of dual-stack technology.

    • D.

      Use tunneling to encapsulate the IPv6 traffic in the IPv4 protocol.

    Correct Answer
    D. Use tunneling to encapsulate the IPv6 traffic in the IPv4 protocol.
    Explanation
    The easiest solution to connect two IPv6 islands through a public network that only supports IPv4 equipment is to use tunneling. Tunneling involves encapsulating IPv6 traffic within the IPv4 protocol, allowing it to traverse the IPv4 network. This allows the IPv6 islands to communicate with each other by encapsulating the IPv6 packets within IPv4 packets, which can be understood by the IPv4 devices on the public network. This solution avoids the need to replace devices or configure RIPng or dual-stack technology.

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  • 21. 

    After activating IPv6 routing on a Cisco router and programming IPv6 addresses on multiple interfaces, what is the remaining step to activate RIPng?

    • A.

      Enter the interface programming mode for each IPv6 interface and enable IPng RIP.

    • B.

      Enter the ipv6 router rip name command and then use network statements to activate RIPng on the interfaces.

    • C.

      Enter the router rip command, and then activate RIPng using the version command.

    • D.

      RIPng then automatically runs on all IPv6 interfaces.

    • E.

      Enter the interface programming mode for each IPv6 interface and enable the multicast group FF02::9, and then activate RIPng globally using the ipv6 router rip name command.

    Correct Answer
    A. Enter the interface programming mode for each IPv6 interface and enable IPng RIP.
    Explanation
    The correct answer is to enter the interface programming mode for each IPv6 interface and enable IPng RIP. This step is necessary to activate RIPng on the specific interfaces where IPv6 addresses have been programmed. By enabling IPng RIP on these interfaces, the router will start exchanging RIPng routing information with other routers in the network.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 26, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • May 17, 2012
    Quiz Created by
    Mister_kupido09
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