Computer Networking
Which statements are true regarding ICMP packets?1. They acknowledge receipt of a TCP segment.2. They guarantee datagram delivery.3. They can provide hosts with information about network problems.4. They are encapsulated within IP datagrams.

2, 3 and 4
2 and 3
1 only
3 and 4

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To create collision domains
To prevent switching loops in networks with redundant switched paths
To prevent routing loops in networks with redundant paths
To manage the VLAN database across multiple switches
To provide a mechanism for network monitoring in switched environments

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Computer Networking
Demodulation is a process of

converting analog to digital signals
multiplexing various signals into one high speed line signals
performing data description.
converting digital to analog signals

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Computer Networking
Which of the following refers to the terms "residual error rate"?

the probability that one or more errors will be detected when an error detection mechanism is used
signal to noise ratio divided by the ratio of energy per bit to noise per hertz
The probability that one or more errors will be undetected when an error detection scheme is used
the number of bit errors per twenty four hours of continuous operation on an asynchronous line
None of these

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