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Unformatted text preview: FTP user agent, a Telnet user agent, an audio/video player user agent (such as a Real Networks player), an instant messaging agent, a P2P file-sharing agent, etc. 5) What is meant by a handshaking protocol? A protocol uses handshaking if the two communicating entities first exchange control packets before sending data to each other. SMTP uses handshaking at the application layer whereas HTTP does not. 6) Why do HTTP, FTP, SMTP, POP3 and IMAP run on top of TCP rather than UDP? The applications associated with those protocols require that all application data be received in the correct order and without gaps. TCP provides this service whereas UDP does not....
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- Summer '10