By increasing the size of the IP address to 128 bits, there
is ample address space. IP version 4 (IPv4) will not be converted to IP version 6 (IPv6)
overnight. Transition techniques, such as dual stacks, IPv6-to-IPv4 tunnels, and NATProtocol
Translation (NAT-PT), provide options for transitioning from IPv4 and IPv6.
The following summarizes the key points that were discussed in this chapter:
?– NAT is a short-term solution to the limited number of unique IP addresses that IPv4
provides. The types of NAT you can con?¬?gure include static, dynamic, and overloading
(PAT).
?– IPv6 is a long-term solution to running out of IPv4 addresses. IPv6 increases the size
of the IP address to 128 bits and incorporates features such as autocon?¬?guration,
security, and several solutions for transitioning from IPv4 to IPv6.
290 Chapter 7: Managing Address Spaces with NAT and IPv6
Review Questions
Use the questions here to review what you learned in this chapter. The correct answers and
solutions are found in the appendix, ???Answers to Chapter Review Questions.???
1. Match each NAT term with its de?¬?nition.
____ 1. Static NAT
____ 2. Dynamic NAT
____ 3.
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