Before a receiving host can even examine the TCP or UDP header, which of the following must happen?
A) The host must process the outer headers in the message.
B) The host must find the destination port field.
C) The host must encapsulate the packet.
D) It must read the Ethernet frame.
A
Explanation: A) The outer headers of the message need to be processed. The type of connection determines this, so it may not be Ethernet. The host does not encapsulate the packet, and the destination port is determined after this step.
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