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30 December, 08:02

FTP requires confirmation that a file was successfully transmitted to a client, but it has no built-in mechanism to track this information for itself. What protocol does FTP rely on at the Transport layer of the TCP/IP model to ensure delivery is complete?

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  1. 30 December, 08:36
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    Transmission Control Protocol (TCP)

    Explanation:

    FTP: FTP stand for File Transfer Protocol. It is an internet protocol for transferring files between computers on a computer network over TCP/IP connections. It is based on client server architecture in which a client asks for a file and the server (local or remote) sends it. FTP uses TCP to ensure all the data packets are transmitted correctly to the proper destination.

    Transmission Control Protocol: It is a protocol used in the Transport Layer of the TCP/IP model. The basic role of this layer is to ensure end-to-end delivery of data from the source to the destination. TCP is a connection oriented protocol that works with the Internet Protocol and provides ordered, guaranteed and error free delivery of data from source to destination. This is how application programs communicate and exchange data through an IP network. It is connection oriented protocol means connection between client and server is setup before data transmission. At source host TCP divides streams of bytes in segments. Then it allocates sequence number to each segment. At destination end it reorders the delivered segments. Then it sends an acknowledgment to sender as a signal that the correct segments have been received. TCP also employs error detection that ensure reliability. TCP also manages flow control and congestion control to avoid data packets loss or delay and to ensure that a sender does not send packets faster than the receiver can receive.
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