436 Chapter A: Answers to the "Do I Know This Already?" Quizzes and Q&A Sections
6
What TCP header information is altered by using NAT overload?
The source IP address, the subnet mask, and the source port number are altered.
7
When should NAT overlap be deployed?
It should be deployed in a network merger in which two entities are using the same IP
numbering scheme or two intranets are using the same numbering scheme.
8
What NAT translation is generally used for overlapped networks? Why?
Simple NAT is used because the administrator generally controls both networks that are
being translated.
9
Briefly describe the use of NAT TCP load distribution.
Load distribution advertises a single IP address and when it is referenced, it is translated
to a pool of addresses that represents a group of mirrored servers or devices.
10
List the four NAT address descriptions and a brief definition of each.
The NAT address descriptions are as follows:
Inside Local address classes are IP addresses that are unique to the host inside the
network, but not globally significant
Inside Global address classes are IP addresses that are assigned by the Internet Assigned
Numbers Authority (IANA) or service provider and that are legitimate in the global
address space or Internet.
Outside Local address classes are IP addresses of a host on an outside network that is
presented to the inside network and that is legitimate to the local network.
Outside Global address classes are IP addresses that are globally routable on the Internet
space.
11
An inside local address is translated to what in a simple NAT translation?
It is translated to an Inside Global address.
12
What are the four types of NAT translations or configurations?
They are simple, overload, overlap, and TCP load distribution.
13
What command is used to erase all current NAT- translated sessions?
clear ip nat translation *
14
Port address translation is used on what router series only?
It is used on the Cisco 700 series routers.