The common packet format that can be transferred by any networking technology and that serves all applications is defined at the layer.

Network

Explanation:

At layer 3 of the OSI model is the network layer which is the layer between the datalink layer(below it) and the transport layer(above it). It is mainly responsible for:

i. forwarding data in the form of packets withing a network and;

ii. routing i.e moving packets from one host(device) to another across networks.

Some hardware devices found in this layer are routers and switches.

The network layer's most common protocol is the Internet Protocol which is a standard communication protocol for transferring datagrams across networks.

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