Question

what is URL and define its parts

Answer 1

url means uniform resource locator.

the first part of the URl is called a protocol identifier

the second part is called a resource name.

Answer 2

What's actually a URL?

Uniform Resource Locator - abbreviated as URL - is an address that uniquely identifies a location on the Internet. Every file on the Internet has a URL. In simpler words, a URL is the address for a website.

For instance, www.brainly.in 
It's the URL, that leads to the brainly website.

The format of the URL is: protocol://host/path/filename

Parts of the URL:

1) Protocol
2) Host computer name
3) Lower level domain name
4) Upper level domain name
5) Filename