DNS :- Domain Name System

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Host Name: use to identify each computer there is a name that calls hostname.

on the Internet, the hostname is appended with DNS domains.

hostname and domain name are separated with dot Exam: www.opera.org

Here lol and 10q host is present in-app network so they are present in the same network so they can identify using only hostname.

Domain Name for both computers is :

lol.app and 10q.app