Discussion
Which statements are true regarding ICMP packets?
1.ICMP guarantees datagram delivery.
2.ICMP can provide hosts with information about network problems.
3.ICMP is encapsulated within IP datagrams.
4.ICMP is encapsulated within UDP datagrams.
Answer: B
Correct answer: 2 and 3
Statements 2 and 3 are correct: ICMP carries information about network problems, and its messages are encapsulated within IP datagrams. Statement 1 is wrong - ICMP reports on delivery failures but guarantees nothing, and IP remains best-effort. Statement 4 confuses the encapsulation: ICMP sits directly inside IP with protocol number 1, not inside UDP.
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