432 Chapter A: Answers to the "Do I Know This Already?" Quizzes and Q&A Sections
13
List the types of compression supported by most Cisco routers.
Link compression, payload compression, TCP header compression, and Microsoft Point-
to-Point Compression are supported by most Cisco router models. Other chassis models
support additional types of compression.
14
When should link compression be implemented?
Link compression works best on point-to-point dedicated circuits that do not require the
use of header information for switching purposes.
15
Which type of compression should be utilized on virtual circuit-based WAN deployments?
Payload compression should be used on VC-based deployments. This leaves the Layer 2
header intact for use by the carrier network.
For the remaining questions, refer to Figure A-3 for the existing network topology.
Figure A-3
Chapter 10 Q&A Network Topology
16
At first look, is this network a good candidate for queuing implementation? Why?
Yes. It has low bandwidth, and, because of the default characteristics of the protocols
going across the link, it has a good chance of experiencing congestion.
17
Configure both routers for WFQ. Use a congestive discard threshold of 256.
Example A-7
RouterA
RouterA(config-if)#fair-queue 256
Example A-8
RouterB
RouterB(config-if)#fair-queue 256
Router A
Router A
Router B
S0
S0
Protocols:
IP, IPX, AppleTalk
Link: 56 kbps HDLC