Cabletron Systems SSIM-R8-02 Specifikace stáhnout pdf (Strana 259)

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101

Enterasys Xpedition User Reference Manual 239

Chapter 18

Chapter 19

Network Address

Translation

Configuration Guide

Overview

Note: Some commands in this facility require updated XP hardware.

Network Address Translation (NAT) allows an IP address used within one network to be

translated into a different IP address used within another network. NAT is often used to

map addresses used in a private, local intranet to one or more addresses used in the

public, global Internet. NAT provides the following benefits:

• Limits the number of IP addresses used for private intranets that are required to be

registered with the Internet Assigned Numbers Authority (IANA).

• Conserves the number of global IP addresses needed by a private intranet (for

example, an entity can use a single IP address to communicate on the Internet).

• Maintains privacy of local networks, as internal IP addresses are hidden from public

view.

With NAT, the local network is designated the inside network and the global Internet is

designated the outside network. In addition, the XP supports Port Address Translation

(PAT) for either static or dynamic address bindings.

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