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NE20E-S2 V800R010C10SPC500 Feature Description - NAT and IPv6 Transition 01

This is NE20E-S2 V800R010C10SPC500 Feature Description - NAT and IPv6 Transition
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Overview of NAT

Overview of NAT

Definition

Network address translation (NAT) is an IP address translation technology that allows multiple private network users to share a few public IPv4 addresses to access public networks. A NAT device translates private IPv4 addresses in packets to public IPv4 addresses and records the mapping before users access the Internet.

Purpose

As the Internet is being developed and the network applications are growing, IPv4 address exhaustion constrains network development. Before IPv6 can be widely used to replace IPv4 that has been running on network devices and is bearing existing applications, some IPv4-to-IPv6 transition techniques can be used to alleviate IPv4 address shortage.

NAT provides a transition solution of repeatedly using IPv4 addresses that slows down the tendency towards IPv4 address exhaustion, which helps IPv4 users and services to be transitioned to IPv6.

Benefits

NAT offers the following benefits to enterprise users:
  • Enhances the ability of deploying security and reliability services, saving router costs.

  • Provides mature service provision techniques, facilitating NAT deployment.

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Updated: 2019-01-02

Document ID: EDOC1100055472

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