mod 6 Nat for Ipv4

12. What is a security feature of using NAT on a network?

allows internal IP addresses to be concealed from external users

11. A company designs its network so that the PCs in the internal network are assigned IP addresses from DHCP servers, and the packets that are sent to the Internet are translated through a NAT-enabled router. What type of NAT enables the router to populate the translation table from a pool of unique public addresses, as the PCs send packets through the router to the Internet?

dynamic NAT

14. A company has been assigned the 203.0.113.0/27 block of IP addresses by the ISP. The company has over 6000 internal devices. What type of NAT would be most appropriate for the employee workstations of the company?

dynamic NAT overload using the pool of addresses

10. Refer to the exhibit. From the perspective of users behind the NAT router, what type of NAT address is 209.165.201.1?

inside global

8. Using NAT terminology, what is the address of the source host on a private network as seen from inside the network?

inside local

40. In NAT terms, what address type refers to the globally routable IPv4 address of a destination host on the Internet?

outside global

25. What does NAT overloading use to track multiple internal hosts that use one inside global address?

port numbers

35. What type of address is 64.100.190.189?

public

53. What two addresses are specified in a static NAT configuration?

the inside local and the inside global

6. Refer to the exhibit. Given the commands as shown, how many hosts on the internal LAN off R1 can have simultaneous NAT translations on R1?

1

13. Refer to the exhibit. Which source address is being used by router R1 for packets being forwarded to the Internet?

209.165.200.225

27. Refer to the exhibit. R1 is configured for static NAT. What IP address will Internet hosts use to reach PC1?

209.165.200.225

5. Refer to the exhibit. From the perspective of R1, the NAT router, which address is the inside global address?

209.165.200.225

8. Refer to the exhibit. NAT is configured on RT1 and RT2. The PC is sending a request to the web server. What IPv4 address is the source IP address in the packet between RT2 and the web server?

209.165.200.245

11. Refer to the exhibit. Static NAT is being configured to allow PC 1 access to the web server on the internal network. What two addresses are needed in place of A and B to complete the static NAT configuration? (Choose two.)

A = 10.1.0.13 B = 209.165.201.1

7. Refer to the exhibit. A network administrator has just configured address translation and is verifying the configuration. What three things can the administrator verify? (Choose three.)

A standard access list numbered 1 was used as part of the configuration process. Address translation is working. Two types of NAT are enabled.

7. What address translation is performed by static NAT?

An inside local address is translated to a specified inside global address.

10. 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.

5. What is one advantage of using NAT at the edge of the network?

Changing ISPs is simpler because the devices on the inside network do not have to be configured with new addresses when the outside address changes.

52. What is a disadvantage when both sides of a communication use PAT?

End-to-end IPv4 traceability is lost.

3. What are two tasks to perform when configuring static NAT? (Choose two.)

Identify the participating interfaces as inside or outside interfaces. Create a mapping between the inside local and inside global addresses.

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

Interface S0/0/0 should be configured with the command ip nat outside.

12. What is the purpose of the overload keyword in the ip nat inside source list 1 pool NAT_POOL overload command?

It allows many inside hosts to share one or a few inside global addresses.

6. What benefit does NAT64 provide?

It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.

9. Which statement accurately describes dynamic NAT?

It provides an automated mapping of inside local to inside global IP addresses.

1. Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)

NAT introduces problems for some applications that require end-to-end connectivity. NAT provides a solution to slow down the IPv4 address depletion.

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

Not enough information is given to determine if both static and dynamic NAT are working.

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

PAT

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

PAT using an external interface

64. What type of address is 10.131.48.7?

Private

55. What type of address is 128.107.240.239?

Public

2. A network administrator wants to examine the active NAT translations on a border router. Which command would perform the task?

Router# show ip nat translations

What problem is causing PC-A to be unable to communicate with the Internet?

The NAT interfaces are not correctly assigned.

13. 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?

The request to the server for the seventh user fails.

47. Refer to the exhibit. A network administrator is viewing the output from the command show ip nat translations. Which statement correctly describes the NAT translation that is occurring on router RT2?​

The traffic from a source IPv4 address of 192.168.254.253 is being translated to 192.0.2.88 by means of static NAT.

63. Refer to the exhibit. A network administrator is viewing the output from the command show ip nat translations . Which statement correctly describes the NAT translation that is occurring on router RT2?​

The traffic from a source IPv4 address of 192.168.254.253 is being translated to 192.0.2.88 by means of static NAT.

4. What is a disadvantage of NAT?

There is no end-to-end addressing.