Network Address Translation

Question 1

IP Class A

Answer 1

10.0.0.0 - 10.255.255.255

Question 2

IP Class B

Answer 2

172.16.0.0 - 172.31.255.255

Private Class B

Question 3

IP Class C

Answer 3

192.168.0.0 - 192.168.255.255

Private Class C

Question 4

Can private IP addresses be transmitted over the internet?

Answer 4

No, a request from a computer with a private IP address will hit the router, then use Network Address Translation (NAT) or Port Address Translation (PAT) to send out its request.

Question 5

What is Port Address Translation?

Answer 5

Router remembers which computer sent a request to the internet by assigning it a random high number port. Therefore when the request is received, it can send the request to that specific computer.

Question 6

What is Network Address Translation?

Answer 6

The process of changing an IP address when it passes through the router.

Note: This was originally used to conserve the limited number of IP addresses, but had the side effect of helping security by hiding computers behind the router.