OSI Layer

Application Layer

Every end-user directly connected with the application layer, the Application layer is responsible to identify for which type of application the user wants to access.

here is some example of application type with a port number

• HTTP 80/tcp
• https :443/tcp
• Telnet : 23/tcp
• Echo : 7/ tcp /udp
• Ftp : 21/tcp
• SSH: 22/tcp

if you want to see more example of application service please open this location

for Windows user visit

C:\Windows\System32\drivers\etc\services 

Note: - Open in notepad