Hey Tejasvy!!!

A computer network is simply a collection of computer equipment that's connected with wires, optical fibers, or wireless links so the various separate devices (known as nodes) can "talk" to one another and swap data.
You can do lots of things with a computer but, connect it up to other computers and peripherals (the general name given to add-on bits of computer equipment such as modems, inkjet and laser printers, and scanners) and you can do an awful lot more
The main part of networks that should be covered by a networking student is OSI model which has 7 Layers.

thank you...

All the best!
Stay home, stay safe!!!