Cisco CCNA NAT for IPv4 Questions and Answers

Question 1

A network administrator configures a Cisco router to translate multiple private IP addresses from the 192.168.10.0/24 network to a single public IP address on its GigabitEthernet0/0 interface.
Which command correctly configures this Port Address Translation (PAT)?

Accepted Answer

ip nat inside source list 1 interface GigabitEthernet0/0 overload

Answer

ip nat inside source static 192.168.10.10 203.0.113.5

Answer

ip nat inside source list 1 pool MY_POOL

Answer

ip nat pool MY_POOL 203.0.113.5 203.0.113.5 netmask 255.255.255.0

Question 2

In the context of NAT terminology, what does the 'inside global' address represent?

Accepted Answer

The IP address of an internal host as it appears to the public network.

Answer

The private IP address assigned to a host on the internal network.

Answer

The public IP address of a destination host on the internet.

Answer

The IP address of an external host as it appears to the internal network.

Question 3

A company has a web server with the private IP address 10.1.1.100. The network administrator needs to make this server permanently accessible from the internet via the public IP address 209.165.200.225. Which type of NAT should be configured to achieve this one-to-one mapping?

Accepted Answer

Static NAT

Answer

Dynamic NAT

Answer

PAT (NAT Overload)

Answer

Policy-Based NAT

Question 4

A network technician is troubleshooting an issue where internal users cannot access the internet. On the edge router, the command `show ip nat statistics` reveals a large number of 'misses' but zero 'hits'. The configuration is intended to use a pool of public IP addresses for translation. What is the most likely cause of this issue?

Accepted Answer

The access list defining traffic to be translated is not matching any packets.

Answer

The NAT pool is completely exhausted of available addresses.

Answer

The `ip nat outside` command is configured on the wrong interface.

Answer

The `ip nat inside` and `ip nat outside` interface commands are missing.

Question 5

Which of the following is a primary advantage of using dynamic NAT without overload (PAT) instead of static NAT?

Accepted Answer

It conserves public IP addresses by creating translations only when they are needed for outbound connections.

Answer

It allows a specific internal server to be reached from the internet on a fixed public IP.

Answer

It allows multiple internal hosts to share a single public IP address simultaneously.

Answer

It provides a permanent one-to-one mapping for every host on the internal network.

Question 6

A PC with the IP address 192.168.50.5 sends a packet to a public web server at 203.0.113.10. The packet traverses a router performing PAT. The router translates the source IP to 209.165.201.30. In this scenario, what does the address 203.0.113.10 represent?

Accepted Answer

Outside Global

Answer

Inside Local

Answer

Inside Global

Answer

Outside Local

A network administrator configures a Cisco router to translate multiple private IP addresses from the 192.168.10.0/24 network to a single public IP address on its GigabitEthernet0/0 interface.Which command correctly configures this Port Address Translation (PAT)?

A network administrator configures a Cisco router to translate multiple private IP addresses from the 192.168.10.0/24 network to a single public IP address on its GigabitEthernet0/0 interface.
Which command correctly configures this Port Address Translation (PAT)?