The maximum segment Size (MSS) defines the maximum number of Oktetts, which can be dispatched as utilizable data in a TCP segment. During the connection establishment the two receiving stations agree on the smaller two MSS values. Since with IPv4 of the IP and TCP headers together at least 40 of Oktetts is large, the MSS must be smaller there around at least 40 of Oktetts than the maximum transfer unit (MTU), in order to avoid a fragmenting of the IP packages.

See also

• RFC 879 The TCP maximum segment Size and Related Topics

Articles in category "Maximum segment Size"

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• 4.2.2.6 Maximum Segment Size Option: RFC-793 Section 3.1
  TCP MUST implement both sending and receiving the Maximum Segment Size ... The maximum size of a segment that TCP really sends, the "effective send MSS," ...


• Define maximum segment size - a definition from Whatis.com - see ...
  The maximum segment size (MSS) is the largest amount of data, specified in bytes, that a computer or communications device can handle in a single, ...


• maximum segment size - a Whatis.com definition
  The maximum segment size (MSS) is the largest amount of data, specified in bytes, that a computer or communications device can handle in a single, ...


• Maximum segment size - Wikipedia, the free encyclopedia
  The maximum segment size (MSS) is the largest amount of data, specified in bytes, that a computer or communications device can handle in a single, ...


• RFC 879
  RFC 879 (RFC879) at The RFC Archive


• TCP option 2, Maximum Segment Size
  Maximum Segment Size. 16 bits. This field must only be sent in the initial connection request (ie, in segments with the SYN control bit set). ...