Class e, Private network ip addresses, Network address translation (nat) – Comtech EF Data SLM-5650A Vipersat User Manual

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IP Addressing

A-8

Vipersat SLM-5650A User Guide

Class E

• 240.0.0.0 to 255.255.255.255
• Reserved for experimental use and limited broadcast

Private Network IP Addresses

RFC 1918 defines blocks of addresses for use on private networks:

• 10.0.0.0 – 10.255.255.255
• 172.16.0.0 – 172.31.255.255
• 192.168.0.0 – 192.168.255.255

Network Address Translation (NAT)

Private networks can only connect to the public Internet by using a Network

Address Translation (NAT) device (a router, for example) or a proxy server

which has been assigned a public IP address. These network devices use a

public IP address to request information from the Internet on behalf of the

private IP addressed devices on the associated private network.

Figure A-5 NAT Router Example

This use of private addresses helps to conserve public IP addresses.

Subnets

Subnets can be defined as the further segmentation of the InterNIC assigned

Network ID IP address. The amount and type of subnetting performed by the

organization is determined by the network layout.

thernet

Host 1

Host 2

NAT Router

Internet

192.168.0.2

192.168.0.3

192.168.0.1

Public IP