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
3 and 4
1 only
2 and 3

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Computer Networking
The application layer of a network

defines the user's port into the network
establishes, maintains, and terminates virtual circuits
None of these
consists of software being run on the computer connected to the network
All of these

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