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* TCP
is a connection oriented, reliable protocol used in internet to provide
a reliable endto- end byte stream over an unreliable internetwork (IP)
* An
internetwork differs from a single network because different parts have
different topologies, Bandwidths, Delays, Packet sizes and other parameters
* TCP
has been designed to dynamically adapt to the properties of the internetwork.
* TCP
is connection oriented, two processes hand shake each other to establish a connection
* Connection
is established between two processes by initializing variables in a connection record
called transmission control block (TCB).
* Connection
is established bidirectional; hence data transfer takes place simultaneously in
both directions.
* Stream
Data Transfer:- transfers a contiguous stream of bytes across the network, with no
indication of boundaries
* Doesn’t
support multicasting or broadcasting.
* Uses
selective repeat ARQ to implement reliability.
* A
TCP connection is uniquely identified by 4 parameters:
1)
Sender IP address
2)
Sender port number
3)
Receiver IP address
4)
Receiver port number
Typically
server is assigned a well known port number and client is assigned an ephemeral
port number.
Port
addresses
TCP Protocol
Source Port and
Destination port:-The
source and destination ports identify the sending and receiving applications.
Sequence
number:- 32
bit sequence numbers are used for acknowledgements and window mechanism
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