What is the Network Layer?

The Network Layer is layer three of the OSI model.

The Network Layer resides above the Data Link Layer and below the Transport Layer.

The Network Layer is responsible for establishing paths for data transfer through the network.

The Network Layer extends the Data Link Layer beyond the local network into an internetwork by providing for routing and forwarding of packets.

The Network Layer is also responsible for packet sequencing, congestion control, and error handling.

Routers operate at the Network Layer.
Network Layer Standards

Standards which operate at the Network Layer include: IP and ICMP.