Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about whether 127.0.0.1 is a domain name. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

127.0.0.1 is not a domain name, but 127.0.0.1 is a loopback address, which refers to the local machine and is generally used for testing. The loopback address (127.x.x.x) is the local loopback address (Loopback Address), that is, the IP address inside the host IP stack, which is mainly used for network software testing and local inter-process communication. No matter what program, once the loopback address is used to send data, the protocol software immediately returns without any network transmission.

127.0.0.1 and localhost

127.0.0.1 and localhost are common in most cases, but there is still an obvious difference between them before. First of all, it is distinguished conceptually. 127.0.0.1 is the IP address, localhost is the local domain name, and the relationship between them can be seen in the hosts file under the Windows system. There are two records by default in the hosts file. Localhost corresponds to the local IPv4 (127.0.0.1) and IPv6 address (:: 1). This file can be modified. Second, it is slightly different when using it. Although both can use the ping command, ping localhost will find that localhost is parsed to:: 1, which is actually the IPv6 form of 127.0.0.1. In addition, ping 127.0.0.1 is usually used to check whether the network card status is normal.

127.0.0.1 how does it work

According to the TCP/IP protocol, all network requests contain the source IP and the destination address IP. The packet is checked before the request data is sent to the network. If the destination address contains 127.0.0.1, the packet is directly filtered and the request data is rerouted to the source IP for processing by the driver. This ensures that requests for access to 127.0.0.1 will not be sent to the network and prevents network attackers from attacking others by disguising malicious network data as loopback addresses.

127.0.0.1 and other

A, 0.0.0.0: it represents a collection of all unknown hosts and destination networks.

B, 255.255.255.255: restrict the broadcast address, which cannot be forwarded by the router.

The above is whether 127.0.0.1 is a domain name shared by the editor. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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