Hello, this is my first post on here - I need some help on understanding the application layer of the TCP/IP model, I understand the process of how data is sent from one system to another, but I don't understand what happens then. The TCP protocol splits the data into packets - IP is used for routing and Ethernet or whatever other physical method for sending the data. It seems that covers how data is sent between two systems - I don't understand the purpose of the application layer because of this - or why an application is required to send/receive data on a network. Help please, thanks.
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