Cisco CCNA NAT for IPv4 2

Question 1

Which NAT type allows multiple inside hosts to share a single public IP address using port numbers?

Accepted Answer

PAT (NAT Overload)

Answer

PAT (Port Address Translation), also called NAT Overload, maps multiple private IPs to a single public IP by tracking unique port numbers.

Question 2

On a Cisco router, which command verifies active NAT translations in the translation table?

Accepted Answer

show ip nat translations

Answer

'show ip nat translations' displays the current entries in the NAT translation table including inside local, inside global, outside local, and outside global addresses.

Question 3

What does the 'inside global' address represent in NAT terminology?

Accepted Answer

The public IP assigned to an internal host as seen from the outside

Answer

The inside global address is the translated (public) IP address that represents an internal host as seen from the outside network.

Question 4

A router is configured with 'ip nat inside source list 10 interface GigabitEthernet0/0 overload'. What does 'overload' specify?

Accepted Answer

PAT using the interface's IP address

Answer

The 'overload' keyword enables PAT, and using 'interface' instead of a pool means the router's interface IP is used as the single public address.

Question 5

Which command clears all dynamic NAT translations from the translation table?

Accepted Answer

clear ip nat translation *

Answer

'clear ip nat translation *' removes all dynamic NAT entries; static translations must be removed by deleting their configuration.

Cisco CCNA Practice Test

Cisco CCNA Practice Test

Cisco CCNA NAT for IPv4 2