What is a network?

Wikipedia cites "a computer network is a digital telecommunications network which allows nodes to share resources". Let's break that down.

Digital telecommunications network

This implies the network is digital, so we're not talking about in person networking here.

Which allows nodes to share resources

Nodes are things like routers, switches, servers, firewalls, end devices, ...

Clients

A client is something like a PC, a laptop, a phone etc.
AKA devices that the user interacts with directly.
2 clients connected together can be classified as a network.