TCP is set of protocols that grants permission to anyone that has a PC, modem and an internet connection to access and can distribute information on internet. It assures an in-order and dependable delivery of information from sender to receiver.TCP enables millions of transactions to take place in a day, without a drawback. It is a steady, well-defined, full set of protocols. TCP recovers the failure in a very good and efficient way. It can add more networks without disturbing or harming the previous ones.
It has the capability to handle large number of errors. Moreover, it offers it services to nearly every kind of programs as that of Windows, Macintosh, Unix etc. Throughout the delivering session, acknowledgements are used to examine if the data is delivered or not.TCP timersTCP make use of several timers to make sure that there must be no delays during the communications. These timers also determine the layer segments that are lost.
It waits for the acknowledgement and if it is not received within the certain period of time, the sender assumes that the packet did not reached its destination and has been lost in the path.
Thus, the sender again sends a packet to the receiver. TCP flags. A flag is considered as predefined bit that has a value in the binary form. TCP has a total of six flags and each of the flag is one bit long:‚§ SYN ” (Synchronisation flag) Used to start a 3-way handshake among two hosts.
‚§ ACK ” (Acknowledgement flag) Used to acknowledge the receipt of the data/packet.‚§ FIN ” (Finished Flag) Used to tell that the data is finished.‚§ URG ” (Urgent Flag) Used to inform the receiver to process the packets that are urgent by leaving the other packets.‚§ PSH ” (Push) It does the same tasks as that of URG as it says to refine the packets instead of buffering them.‚§ RST ” (Reset) It is the flag sent by receiver to the sender for sending unexpected packet.Three-way handshakeA three-way handshake is a process used in TCP/IP to build a link between client and server. It is also known as TCP handshake.
TCP Flow control TCP flow control means TCP will make sure that the amount of data sent by sender to the receiver is not over-flowing. The speed of the data transmission must be up to a limit so that the receiver can receive it and translate the data into its original form without any issues.The speed of sending the data can be reduced if the receiver stops sending or slowdowns the sending of acknowledgements back to the sender.
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