Answers to the Chapter 11 "Do I Know This Already?" Quiz 435
25
Configure the compression technique from Question 22. You must decide the parameters
to use, if any.
Answers to the Chapter 11 "Do I Know This Already?"
Quiz
1
What are the benefits of NAT?
The benefits of NAT include conservation, overlap dysfunction, flexibility, and the
elimination of renumbering. Addresses are conserved because "real" addresses are not
needed for the private network. Overlap dysfunction occurs when two companies, which
were using the same address space, merge. Renumbering occurs when a company changes
ISPs and keeps the same internal address space. When this occurs, only the NAT device
requires a change.
2
What are the disadvantages of NAT?
The disadvantages include increased latency, lesser accountability, and nonfunctionality
with some applications.
3
Using simple NAT translation, what TCP header information is altered?
The source IP address and the subnet mask are altered.
4
What private address space is available from RFC 1918?
5
What does it mean when a NAT translation is overloaded?
When a NAT translation is overloaded, the same IP address is used over and over, and the
tracking is done by using the source port number in addition to the source IP address.
Example A-15
RouterA
RouterA(config-if)#frame-relay payload-compress
Example A-16
RouterB
RouterB(config-if)#frame-relay payload-compress
Address Class
Range
Number of Classful Networks
A
10.0.0.0
1
B
172.16.0.0172.31.0.0
16
C
192.168.0.0192.168.255.0
255