what is network? what is networking?

Network :

It's a scenario (basically an environment) in which two or more communication devices are connected to each other, communicating with each other is call a network.

Communication device can vary as : 

Computer System , Laptops , PDA , Mobile Phones , Modems , Routers ,Switches etc

Networking :

It's a practical approach used to (or taken to) setup a network is called Network.