Lec-75: Application layer of OSI model in Hindi | Application layer protocols & Port no

Here, Varun sir has explained Application layer of OSI model.

The application layer sits at Layer 7, the top of the Open Systems Interconnection (OSI) communications model. It ensures an application can effectively communicate with other applications on different computer systems and networks.

Protocol Name Port No.

Echo 7
FTP 20/21
Secure Shell(SSH) 22
Telnet 23

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[Unknown]

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