Connected: An Internet Encyclopedia
3.1 SACK-Permitted Option

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3.1 SACK-Permitted Option

3.1 SACK-Permitted Option

This two-byte option may be sent in a SYN by a TCP that has been extended to receive (and presumably process) the SACK option once the connection has opened.

      TCP Sack-Permitted Option:

      Kind: 4

             +---------+---------+
             | Kind=4  | Length=2|
             +---------+---------+


Next: 3.2 SACK Option

Connected: An Internet Encyclopedia
3.1 SACK-Permitted Option