Typical applications of TCP

 

Typical applications of TCP

  1. FTP – File Transfer Protocol
    • Used for transferring files.
    • File transfer requires reliable delivery.
    • Lost or corrupted data must be retransmitted.
  2. SMTP – Simple Mail Transfer Protocol
    • Used for sending e-mail.
    • E-mail messages can be large and may contain text, images, audio, or video.
    • Reliable and ordered delivery is important.
  3. TELNET
    • Used for remote login and interactive communication with another computer.
    • Reliable, ordered delivery of the byte stream is required.
    • TCP provides the required reliable stream service.
  4. HTTP – Hypertext Transfer Protocol
    • Used for transferring Web content between clients and servers.
    • Reliable delivery of Web data is important.

In short

Application    ProtocolWhy TCP is suitable
FTP    TCP    Reliable file transfer
SMTP    TCP    Reliable e-mail delivery
TELNET    TCP    Reliable interactive communication
HTTP    TCP    Reliable Web-data transfer

Key idea

TCP is preferred when the application needs reliable, ordered delivery of a continuous stream of data.

This contrasts with UDP, which is preferred when low overhead, low delay, or tolerance of some packet loss is more important.

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