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.

A 2, 3 and 4

B 3 and 4

C 2 and 3

D 1 only

ANS:C - 3 and 4

Internet Control Message Protocol (ICMP) is used to send error messages through the network, but they do not work alone. Every segment or ICMP payload must be encapsulated within an IP datagram (or packet).

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