TCP/IP 5 Layer Model
The TCP/IP 5 Layer Model is essentially a rule book for how computers communicate with each other across a network. Networking is a very complex operation so the 5 layer model is used to try to simplify how data is gets from one node to another. Think of networking as having 5 different layers and each layer has different responsibilities:
Application Layer - Provides the applications used for network communications (e.g. email clients and web browsers).
Transport Layer - Establishes the connection between two nodes on a network.
Internet Layer - Creates and routes data packets across a WAN using IP addresses.
Data Link Layer - Creates and transfers frames across a LAN using MAC addresses.
Physical Layer - Transmits and receives bits over physical wires and connectors.
Transport Layer - Establishes the connection between two nodes on a network.
Internet Layer - Creates and routes data packets across a WAN using IP addresses.
Data Link Layer - Creates and transfers frames across a LAN using MAC addresses.
Physical Layer - Transmits and receives bits over physical wires and connectors.