The document discusses the localhost IP address 127.0.0.1, which refers to the local computer. It is also known as the loopback address, as it allows a computer to communicate with itself via virtual network interfaces. Some uses of the loopback address include running speed tests, troubleshooting, connecting to local servers, and testing programs or web applications on the local machine.

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127.0.0.1/ Localhost
 127.0.0.1 is a loopback Internet Protocol (IP) address also referred to as localhost.
 The localhost is the default name describing the local computer address.
 Its refers as the loopback address.
 Loopback devices are special, virtual network interfaces that the computer uses to
communicate with itself.
 Loopback address allows your computer to exchange data with itself using network
connection protocols
1. Speed Test
2. Troubleshooting
3. Diagnostics
4. Connecting to servers running on local
machine
5. Site Blocking
6. Program or Web Application Test
Uses

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