TCP segments are sent as internet datagrams. The Internet Protocol header carries several information fields, including the source and destination host addresses [2]. A TCP header follows the internet header, supplying information specific to the TCP protocol.
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Data Offset. 4 bits. The number of 32-bit words in the TCP header. This indicates where the data begins. The length of the TCP header is always a multiple of 32 bits. ... Options. 0 to 44 bytes. Options occupy space at the end of the TCP header. All options are included in the checksum. An option may begin on any...
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Transmission Control Protocol - Wikipedia, the free encyclopedia
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The Transmission Control Protocol ( TCP ) is one of the core protocols of the Internet Protocol Suite. TCP is one of the two original components of the suite (the other being Internet Protocol, or...
en.wikipedia.org/wiki/Transmission_Control_Protocol
The above is an example of an TCP Header. Rows 1 through 5 are commonly used, and when options are included in the header, then rows 1 through 6 or more depending upon how many 32-bit option words are used by special options.
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Data offset; 4 bits. The number of 32-bit words in the TCP header, which indicates where the data begins. The TCP header (even one including options) has a length which is an integral number of 32 bits.
www.protocols.com/pbook/tcpip2.htm www.protocols.com/pbook/tcpip2.htm
Transmission Control Protocol (TCP) Option Numbers (last updated 2009-03-17) Registries included below: - TCP Option Kind Numbers - TCP Alternate Checksum Numbers Registry Name: TCP Option Kind Numbers Reference: [RFC2780] Registration Procedures: IESG Approval or Standards Action Note: The Transmission Control...
www.iana.org/assignments/tcp-parameters/ www.iana.org/assignments/tcp-parameters/
TCP Header Flags For further information see [RFC3168] (last updated 2003-07-09) The Transmission Control Protocol (TCP) included a 6-bit Reserved field ...
www.iana.org/assignments/tcp-header-flags www.iana.org/assignments/tcp-header-flags
Instead of computing the checksum over only the actual data fields of the TCP segment, a 12-byte TCP pseudo header is created prior to checksum calculation. This header contains important information taken from fields in both the TCP header and the IP datagram into which the TCP segment will be encapsulated.
www.tcpipguide.com/free/t_TCPChecksumCalculationandtheT... www.tcpipguide.com/free/t_TCPChecksumCalculationandtheTCPPseudoHeader-2.htm
The Transmission Control Protocol (TCP) is a connection-oriented reliable protocol. It provides a reliable transport service between pairs of processes executing on End Systems ... The transport header contains a Service Access Point which indicates the protocol which is being used (e.g. 23 = Telnet; 25 = Mail; 69 = TFTP;
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Van Jacobson TCP/IP Header Compression - Wikipedia, the free encyclopedia
Van Jacobson TCP/IP Header Compression is a data compression protocol described in RFC 1144 , specifically designed by Van Jacobson to improve TCP/IP performance over slow serial links. Van Jacobso...
en.wikipedia.org/wiki/Van_Jacobson_TCP/IP_Header_Compre... en.wikipedia.org/wiki/Van_Jacobson_TCP/IP_Header_Compression
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