What is the maximum size of data that the application layer

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What is the maximum size of data that the application layer can pass on to the TCP layer below?

1. Any size
2. 2¹⁶ byte size of TCP header
3. 2¹⁶ byte
4. 1500 byte

Correct Option: A

The default TCP Maximum Segment Size is 536. Where a host wishes to set the maximum segment size to a value other than the default, the maximum segment size is specified as a TCP option, initially in the TCP SYN packet during the TCP handshake. Because the maximum segment size parameter is controlled by a TCP option, a host can change the value in any later segment.