Why AMAZON.COM and amazon.com both works as a url althought we know that URL is case sensitive?

Question

These lines are from a book:

The path of a URL is case sensitive, meaning http://food.com/Broccoli is a different resource than http://food.com/broccoli , because one uses an uppercase B and one uses a lowercase b

Answer 1

 foo://example.com:8042/over/there?name=ferret#nose \_/ \______________/\_________/ \_________/ \__/ | | | | | scheme authority path query fragment

The above is from the URI spec .

Amazon.com is the host name, part of the authority, not part of the case-sensitive path.