![]() The Wikipedia Page has good information on it. I don't know if I explained it very well, but it was the best I could do. This would provide the information to local applications, while disabling the ability for somebody else on a LAN to access whatever server software you set up as local. Then, YLearn offers a broader overview of naming conventions in. Together with mask 255.0.0.0 it gives you a hint that whole class A of addresses starting with 127. You can specify the server software to transfer information via the loopback address and your client software could listen in on the loop back address. 127.0.0.1 is a loopback address 127.0.0.2 is a loopback address 127.0.0.3 is a loopback address and so on. This can be seen when you have a server-client model application installed on the local computer, but you do not want that information to be accessible remotely. It can also be used to specify to your applications that you do not want your information to leave the host computer. Whatever youre seeing is almost certainly harmless. Its unlike a normal address because its guaranteed to work using the connection, its value is its ability to eliminate hardware (NIC) / driver / software issues. This is handy when you want to connect to a server on your own computer. If you suspect that your NIC is not working on a physical level, this makes a very good test. Theres a loopback address used on computer for testing purposes. What Is 127.0.0.1 127.0.0.1 is known as a loopback address, but you may see it under the name 'localhost.' When you point your browser to 127.0.0.1, it tries to connect to the computer you're using right now. When you do this you are testing to make sure that your information can go down to layer 1 and back up. When you test your NIC, this can be done via "ping 127.0.0.1".
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