Thomas Kunz
Systems and Computer Engineering
337
Overview of TCP
nTCP in the main Internet transport protocol. The UDP plays a supporting role (mostly house keeping functions)
nThe TCP performs the following functions:
–Divides the
data into segments (21 to 64,000 bytes)
–The sending
TCP stamps the segments with sequence numbers
–The
receiving TCP acknowledges the segments
–The
receiving TCP controls the flow of segments
–The TCP can
flag data segments with different priorities (e.g. urgent, externally urgent/to be pushed ..)
–TCP
performs error correction
nThe header of the TCP segment has several other fields
and options
File or large data segment
TCP segment
Header
TCP
segment
Header
TCP
segment
Header
