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
3 and 4
1 only

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Computer Networking
MAC is

a method of determining which device has access to the transmission medium at any time
a method access control technique or multiple-access transmission media
None of these
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued to ISO.

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