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TCP

UDP

1) Connection-oriented protocol.

1) Connection-less protocol.

2) Reliable communication.

2) Not reliable communication.

3) TCP header size is 20 bytes

3) UDP header size is 8 bytes

4) TCP follows 3 – way handshake for connection establishment.

4) No handshake is required, since it is connection less protocol.

5) Example: making a phone call.

5) Example: Playing online games.

6) TCP is required for such protocols that, HTTP, HTTPs, FTP, SMTP, Telnet etc.

6) UDP is required for such protocols that, DNS, DHCP, SNMP, RIP, VOIP, TFTP etc.

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