Network Protocols-Layers

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Layer 1 - Data Link Layer

Passing data over a physical network - Responsible for how stuff is sent as electrical signals over cables and other hardware. 

Ethernet

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Layer

A layer is a group of protocols which have a similar function.

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Layer 2 - Network Layer

Makes connections between networks, directs data packets and handling traffic.

This is used by routers.

IP

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Layer 3 - Transport Layer

Controls data flow - Splits data into packets - Checks packets are sent/delivered

TCP

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Layer 4 - Application Layer

Turns data into websites/applications

HTTP,FTP,SMTP

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