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Interconnecting Cisco Network Devices, Part 2 (ICND2) by Steve McQuerry

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Chapter 7. Managing Address Spaces with NAT and IPv6

<feature><title>This chapter includes the following sections:</title> </feature>

One of the most important drawbacks to IP version 4 (IPv4) is the limited number of unique network addresses; the Internet is running out of address space. Two solutions to this dilemma are Network Address Translation (NAT) and IP version 6 (IPv6).

NAT provides a short-term solution to this problem by translating private IPv4 addresses into globally unique, routable IPv4 addresses. IPv6 is the long-term solution. By increasing the size of an IP address to 128 bits, IPv6 increases the total number of addresses ...

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