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Monday, January 23, 2012

TCP (Transmission Control Protocol, Protocol Transmission Control)









A warm greeting to all visitors to site course network TCP IP is probably the most common level. TCP provides a secure delivery of packets. TCP protocol provides reliable, connection-oriented, over IP (or encapsulated inside IP). TCP guarantees order and delivery of packets, it checks the integrity of the packet header and the data they contain. TCP is responsible for retransmission of packets lost or corrupted by the network during transmission. This reliability makes TCP / IP protocol well suited for data transmission based on the session, the client-server applications and critical services such as e-mail.
The reliability of TCP has its price. The TCP headers require the use of extra bits for correct sequencing of information and a checksum to ensure the reliability required not only the TCP header, but the data in the package. To ensure the successful delivery of data, this protocol also requires that the recipient acknowledges receipt of data.
These acknowledgments (ACK) generates an additional network activity that reduces the rate of data transmission in favor of reliability. To limit the impact of this constraint on performance, most hosts do not send an acknowledgment for a segment or two when the time for an ACK expires.
On a TCP connection between two machines on the network, messages (or TCP) are paid and issued in sequence.

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