TCP is connection-oriented, provides error checking, delivers data
reliably, operates in full-duplex mode, and provides some data recovery functions.
?– TCP/IP supports a number of applications, including FTP, TFTP, and Telnet.
?– IP uses a protocol number in the datagram header to identify which protocol to use for
a particular datagram.
?– Port numbers map Layer 4 to an application.
?– If you use TCP as the transport layer protocol, before applications can transfer data,
both sending and receiving applications inform their respective operating systems that
a connection will be initiated. After synchronization has occurred, the two end systems
have established a connection and data transfer can begin.
?– Flow control avoids the problem of a transmitting host over?¬‚owing the buffers in the
receiving host and slowing network performance.
?– TCP provides sequencing of segments with a forward reference acknowledgement. When
a single segment is sent, receipt is acknowledged, and the next segment is then sent.
?– TCP window size decreases the transmission rate to a level at which congestion and
data loss do not occur. The TCP window size allows for a speci?¬?ed number of
unacknowledged segments to be sent.
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