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
1 only
2 and 3
3 and 4

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Computer Networking
Contention is

a continuous frequency capable of being modulated or impressed with a second signal
a collection of interconnected functional units that provides a data communications service among stations attached to the network
None of these
the condition when two or more stations attempt to use the same channel at the same time
One or more conductors that serve as a common connection for a related group of devices

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Computer Networking
What does a VLAN do?

Provides multiple collision domains on one switch port.
Provides multiple broadcast domains within a single collision domain.
Breaks up broadcast domains in a layer 2 switch internetwork.
Acts as the fastest port to all servers.

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