Private Address Space
RFC1918
- 10/8 10.0.0.0 - 10.255.255.255
- 172.16/12 172.16.0.0 - 172.31.255.255
- 192.168/16 192.168.0.0 - 192.168.255.255
Motivation
- saves public address space
- allows for more flexibility
Suitable when
- hosts do not require access to other networks
- hosts need limited access to outside services
- can use application layer G / W (fire walls, NAT)