NAT

Question 1

Static NAT

Answer 1

One-to-one address mapping - a fixed mapping between a public IP and a private IP of a device

Question 2

Dynamic NAT

Answer 2

Many-to-many address mapping - a pool of IP addresses is maintained and issued on a first-come, first-served basis. A single public IP address cannot be shared among multiple internal hosts at the same time

Question 3

PAT

Answer 3

Port Address Translation
Many-to-one address mapping - a single public IP is shared among multiple devices on a private network using their port address
Router, Firewall service, not switch

Question 4

RFC1918

Answer 4

Private IP addresses

Question 5

Static NAT Usage

Answer 5

When you need to build a translation for a public server that is privately addressed

Question 6

Static PAT Usage

Answer 6

When you need to build a translation for a port on your edge that maps to a different port on a server on the inside

Question 7

Dynamic NAT Usage

Answer 7

When you have an overlapping IP range

Question 8

PAT Usage

Answer 8

For internet connectivity for the inside network

Question 9

SNAT

Answer 9

Secure/Source NAT - Virtual server can access the internet via SNAT