Question

What variation of network address translation (NAT) automatically assigns an inside global address from a pool of available addresses?

a) Dynamic NAT
b) Static NAT
c) PAT (Port Address Translation)
d) NAT64

Answer 1

The variation of NAT that automatically assigns an inside global address from a pool of available addresses is PAT (Port Address Translation). PAT allows multiple private IP addresses to be mapped to a single public IP address by using different port numbers to distinguish the connections.

Step-by-step explanation:

The variation of Network Address Translation (NAT) that automatically assigns an inside global address from a pool of available addresses is PAT (Port Address Translation). PAT allows multiple private IP addresses to be mapped to a single public IP address by using different port numbers to distinguish the connections.

Example:

Let's say a network has three devices with private IP addresses: 192.168.1.10, 192.168.1.11, and 192.168.1.12. When these devices connect to the internet via a router performing PAT, each device will be assigned a unique port number. For example, device 192.168.1.10 might use port 50000, device 192.168.1.11 might use port 50001, and so on. The router then uses its public IP address to route the incoming and outgoing traffic to the correct device based on the port number.