NAT

Question 1

What is NAT?

Answer 1

Translating private IP address to public IP addresses by modifying the source and destination IP addresses in a packet

Question 2

What are the private IP ranges?

Answer 2

10.0.0.0/8 (10.0.0.0 to 10.255.255.255)
172.16.0.0/12 (172.16.0.0 to 172.31.255.255)
192.168.0.0/16 (192.168.0.0 to 192.168.255.255)

Question 3

What can ACLs be used for in Dynamic NAT?

Answer 3

Its used to define the IP addresses that will be translated to inside global ip addresses

Question 4

What is NAT pool? NAT pool exhaustion?

Answer 4

The pool of available inside global addresses to use by NAT. Exhaustion is when all of the addresses in the pool have been used and lead to dropped traffic

Question 5

What is PAT aka NAT overload?

Answer 5

Translates both the ip address and port number so that a single global address can be used with different ports