多选题What statements are true regarding ICMP packets?（）AThey acknowledge receipt of TCP segments.BThey guarantee datagram delivery.CThey can provide hosts with information about network problems.DThey are encapsulated within IP datagrams.EThey are encapsulated within UDP datagrams.
多选题
What statements are true regarding ICMP packets?（）
A
They acknowledge receipt of TCP segments.
B
They guarantee datagram delivery.
C
They can provide hosts with information about network problems.
D
They are encapsulated within IP datagrams.
E
They are encapsulated within UDP datagrams.
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