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Why do HTTP, FTP, SMTP and POP3 run on top of TCP rather than UDP ?

Mumbai University > Information Technology > Sem4 > Computer Networks

Topic : Session & Transport layer

Marks: 5M

Year: Dec 18

1 Answer
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  • TCP is a connection oriented Protocol and is suited for applications which use high reliability and where transmission time is relatively less critical for applications than that use UDP.

    • Where as UDP needs applications that need fast,efficient transmission such as games.

    • Its feature of handling small queries from huge number of clients is useful for servers.Hence this is the reason why TCP is the most commonly used application protocol for HTTP,FTP,SMTP,IMAP,POP3.

    • Also Because TCP is more reliable, and HTTP, FTP, SMTP, and POP3cannot be affordable using UDP while UDP cannot transmit packet and guarantee a well order delivery.

    • TCP is a connected-oriented network so packet will be delivered to the destination.

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