Chapter 3 647
26
What is broadcast radiation?
Broadcast radiation is a problem when the ambient level of broadcasts generated by the
higher-layer protocols in the network restricts the number of nodes that the network can
support. The effects of broadcast radiation can be so severe that an end station can spend
all its CPU power on processing broadcasts.
27
List five typical problems that the CCDP might be asked to solve.
Media contention.
Excessive broadcasts.
Nonscalable protocols.
Security.
Overloaded backbones.
28
When would a multiprotocol backbone be recommended?
When other campus LANs use protocols other than IP. The router introduces latency when
tunneling IP. So, to optimize the design, multiple protocols are preferred over tunneling.
29
What solution is recommended for solving congestion problems that are caused by media
contention?
Switching.
Chapter 3
1
Name four campus LAN technologies.
Ethernet, Token Ring, FDDI, ATM.
2
State a major disadvantage of using Ethernet.
Ethernet allows collisions to occur on the network. An excessive number of collisions
reduces available bandwidth.
3
List two LAN interconnection methods.
Bridging, switching and routing.
4
What are two types of switching methods for Ethernet?
Cut-through and store and forward.
5
State four goals that you can achieve by using switches in a campus LAN.
Reducing network congestion while increasing the available bandwidth.
Organizing users into logical workgroups.
87200333.book Page 647 Wednesday, August 22, 2001 1:41 PM