The Telnet utility uses the Transmission Control Protocol (TCP) for communication. It typically operates over port 23. Telnet facilitates text-based communication between a client and a server, allowing users to access remote devices and systems.
every protocol has its own port no. and are addressed to data by transport layer.
Port Number
The Secure File Transport Protocol (SFTP, also known as SSH or Secure Shell) typically is run on port 22.
EIGRP uses port no. 88, but it is not use TCP or UDP, it's uses RTP(Reliable Transport Protocol).
Port 80, when speaking of computer terms, refers to the port that uses Hypertext Transfer Transport Protocol. This is a commonly used port for any computer that has internet access by any means.
**The TCP transport layer protocol uses windowing and acknowledgments for reliable transfer of data. **The TCP and UDP port numbers are used by application layer protocols. **The TCP transport layer protocol provides services to direct the data packets to their destination hosts.
A port is identified for each address and protocol by a 16-bit number, commonly known as the port number Only one process may bind to a specific IP address and port combination using the same transport protocol.
The IMAP (Internet Message Access Protocol) email protocol usually uses port 143.
What protocol is used by web servers and on which port ?
HTTP is the hyper text transfer protocol . The port used by HTTP is port 80 . The HTTP is the protocol of application layer.
SMTP is a protocol using port 465. POrt 25 and 587 are provided for client sides. This protocol plays the basic role in transferring mails.
SSH uses such port.