If a packet gets “sucked down a black hole” (figuratively speaking) and is not received by its sender, and no message is sent back explaining the situation, then something is wrong. the failure to send a message means something is wrong with the

a.) icmp
b.) tcp/ip
c.) http
d.) iso

If a packet gets “sucked down a black hole” (figuratively speaking) and is not received by its sender, and no message is sent back explaining the situation, then something is wrong. The failure to send a message means something is wrong with the .

A.) ICMP

B.) TCP/IP

C.) HTTP

D.) ISO

A.) ICMP

Hope that helps and good luck

~May

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