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CCNA® Cisco Certified Network Associate: Study Guide, Seventh Edition by Todd Lammle

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Exam Essentials

Understand the term NAT. This may come as news to you, because I didn’t—okay, failed to—mention it earlier, but NAT has a few nicknames. In the industry, it’s referred to as network masquerading, IP-masquerading, and for those who are besieged with OCD and compelled to spell everything out, Network Address Translation. Whatever you want to dub it, basically, they all refer to the process of rewriting the source/destination addresses of IP packets when they go through a router or firewall. Just focus on the process that’s occurring and your understanding of it (i.e., the important part) and you’re on it for sure!

Remember the three methods of NAT. The three methods are static, dynamic, and overloading; the latter is also called ...

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