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  3. You are experiencing intermittent issues relating to congestion within the Ezonexam network. What are the possible causes of con

You are experiencing intermittent issues relating to congestion within the Ezonexam network. What are the possible causes of con

admin2009-05-19  30
问题 You are experiencing intermittent issues relating to congestion within the Ezonexam network. What are the possible causes of congestion on this LAN? (Choose all that apply)
A. A broadcast domain with too many hosts.
B. Full duplex operation.
C. Broadcast storms.
D. Multicasting.
E. Network Segmentation.
F. Low bandwidth.
选项
答案A,C,F
解析 Explanation:
A LAN segment with too many hosts can mean that there are a large number of stations contending for bandwidth. It can also mean an increase in the number of collisions on the segment, which can cause further congestion issues.

Broadcast storms are the result of a large number of broadcasts sent over the LAN. Because each station listens to these broadcast messages, congestion can occur quickly. Finally, low bandwidth can simply mean that the LAN can not process all of the LAN traffic that is being sent. This can mean that TCP sessions are retransmitted, which can lead to additional congestion.

Incorrect Answers:
B. This can alleviate congestion, as data can be sent and received at the same time. In addition, collisions are not possible in a full duplex LAN.

D. Multicasting can actually alleviate congestion issues, as single streams of information can reach multiple hosts at the same time, instead of using a series of point to point
connections.

E. Segmentation breaks up a large LAN into multiple, smaller LANS. This will mean fewer hosts per broadcast domain.
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