CCNA Exploration 4 Chapter 7 Exam Answers

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

It saves public IP addresses.

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

It increases routing performance.

It makes troubleshooting routing issues easier.

It makes tunneling with IPsec less complicated.

 

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

32

48

64

128

 

3.

CCNAExploration4Chapter7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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?

It will randomly generate a 64 bit interface ID.

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

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

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

 

4.

CCNAExploration4Module7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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?

10.1.1.1

172.30.20.2

192.168.1.2

255.255.255.255

 

5. 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?

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

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

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

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

 

6.

CCNAExploration4ExamAnswers thumb4 CCNA Exploration 4 Chapter 7 Exam Answers

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?

The addresses are statically assigned by the network administrator.

The DHCP server dynamically assigns the addresses.

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

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

 

7.

CCNA4ExamAnswers thumb4 CCNA Exploration 4 Chapter 7 Exam Answers

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

ip nat pool statement

access-list statement

ip nat inside is on the wrong interface

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

 

8.

CCNA4Answers thumb4 CCNA Exploration 4 Chapter 7 Exam Answers

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?

defines which addresses can be translated

defines which addresses are allowed into the router

defines which addresses are assigned to a NAT pool

defines which addresses are allowed out of the router

 

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

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

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

Enter the router rip command, and then activate RIPng using the version command. RIPng then automatically runs on all IPv6 interfaces.

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.

 

10. What is true regarding the differences between NAT and PAT?

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

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

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

PAT uses unique source port numbers to distinguish between translations.

 

11.

CCNAExplorationAccessingtheWANChapter7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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?

The DHCP server service is not enabled.

The inside interface for DCHP is not defined.

The DHCP pool is not bound to the interface.

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

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

 

12.

CCNA4Chapter7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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

Traffic from the 10.1.1.0 network will be translated.

Traffic from the 209.165.200.0 network will be translated.

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

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

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.

 

13.

CCNA4Chapter7Answers thumb CCNA Exploration 4 Chapter 7 Exam Answers

Refer to the exhibit. Which address or addresses represent the inside global address?

10.1.1.2

192.168.0.100

209.165.20.25

any address in the 10.1.1.0 network

 

14.

CCNAChapter7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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.)

dynamic NAT

NAT with overloading

open port 20

open port 21

open port 23

NAT with port forwarding

 

15. 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?

8

16

80

128

 

16.

CCNAChapter7Answers thumb CCNA Exploration 4 Chapter 7 Exam 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 user on the inside sees web traffic coming from 192.168.1.3 using port 8080.

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

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

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

 

17.

CCNA4Module7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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.)

10.0.0.125

179.9.8.95

179.9.8.98

179.9.8.101

179.9.8.112

 

18. 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?

NAT overload

static NAT

dynamic NAT

PAT

 

19. 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?

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

Configure RIPng on the border routers of each IPv6 island.

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

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

 

20.

CCNA4Module7Answers thumb CCNA Exploration 4 Chapter 7 Exam Answers

Refer to the exhibit. How many IPv6 broadcast domains exist in this topology?

0

1

2

3

4

 

21.

CCNAModule7ExamAnswers thumb CCNA Exploration 4 Chapter 7 Exam Answers

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

1

6

7

8

9

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2 Comments

  1. camie says:

    ipv6 is not used in most cases so why are w still learning it?

    1. js_biggs says:

      Because they have already handed out the last of the available IPv4 addresses to the Registration authorities. This means that as soon ass these remaining IPv4 addresses are registered, we are officially out of IPv4 addresses.

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