The hosts file
The hosts file is a file used to associate domain names with IP addresses. Nowadays this task would be done by using a DNS server. However the hosts file is still useful for testing or overriding some DNS entries locally.
Historically the hosts file predates the DNS protocol and it is the need to manage the hosts file on lot of computers that created the need for a better way of associating domain names and IP addresses. This ultimately resulted in the DNS protocol.
You can find how to use the hosts file on Windows in the following links:
Once you have made some changes you will want to test them. For that we recommend we use