CCNA 4 Chapter 5 v5 Exam Answers 2016

1 Typically, which network device would be used to perform NAT for a corporate environment?

2 What is the group of public IPv4 addresses used on a NAT-enabled router known as?

3 When NAT is employed in a small office, which address type is typically used for hosts on the local LAN?

4 Which version of NAT allows many hosts inside a private network to simultaneously use a single inside global address for connecting to the Internet?

5 Which type of NAT maps a single inside local address to a single inside global address?

6 Several key servers in an organization must be directly accessible from the Internet. What addressing policy should be implemented for these servers?

7 What is a disadvantage of NAT?

8

Refer to the exhibit. What has to be done in order to complete the static NAT configuration on R1?

9

Refer to the exhibit. R1 is configured for NAT as displayed. What is wrong with the configuration?

10 Which statement accurately describes dynamic NAT?

11 A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. What is required to be configured in order for this particular command to be functional?

12 When dynamic NAT without overloading is being used, what happens if seven users attempt to access a public server on the Internet when only six addresses are available in the NAT pool?

13 A network engineer has configured a router with the command ip nat inside source list 4 pool corp overload. Why did the engineer use the overload option?

14

Refer to the exhibit. What will be the effect of entering the command that is shown in the exhibit on R2 as part of the dynamic NAT configuration?

15 Which configuration would be appropriate for a small business that has the public IP address of 209.165.200.225/30 assigned to the external interface on the router that connects to the Internet?

16 What are two required steps to configure PAT? (Choose two.)

17

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?

18 What is the purpose of port forwarding?

19 What is a characteristic of unique local addresses?

20

Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?

21

Refer to the exhibit. The NAT configuration applied to the router is as follows:
ERtr(config)# access-list 1 permit 10.0.0.0 0.255.255.255
ERtr(config)# ip nat pool corp 209.165.201.6 209.165.201.30 netmask 255.255.255.224
ERtr(config)# ip nat inside source list 1 pool corp overload
ERtr(config)# ip nat inside source static 10.10.10.55 209.165.201.4
ERtr(config)# interface gigabitethernet 0/0
ERtr(config-if)# ip nat inside
ERtr(config-if)# interface serial 0/0/0
ERtr(config-if)# ip nat outside

Based on the configuration and the output shown, what can be determined about the NAT status within the organization?

22

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What problem is causing PC-A to be unable to communicate with the Internet?

23. Match the steps with the actions that are involved when an internal host with IP address 192.168.10.10 attempts to send a packet to an external server at the IP address 209.165.200.254 across a router R1 that is running dynamic NAT. (Not all options are used.)

24
What are two of the required steps to configure PAT? (Choose two.)

25. How does NAT complicate the use of IPsec?

26. Which technology would be used on a router that is running both IPv4 and IPv6?

27. Which prefix is used for IPv6 ULAs?

28. Fill in the blank. Do not use abbreviations.