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This article will explain in detail what is the function of ping 127.0.0.1 in the computer. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

The function of ping 127.0.0.1 is to determine whether the local host can successfully exchange packets with another host, and then determine the connectivity of the host based on the returned results, where ping is a service command working in the application layer of the TCP/IP network architecture.

This article operating environment: windows7 system, Dell G3 computer.

PING 127.0.0.1 is actually PING's own computer native.

The purpose is to check whether the circuit of this machine is normal, if it is normal, it means that the TCP/IP protocol of this machine is installed normally. If even this is not normal, it means that there is something wrong with the TCP/IP protocol, then it is necessary to repair the TCP/IP protocol from the system level to solve the network failure encountered.

The meaning of ping 127.0.0.1: the ping operation of this host is used to determine whether the local host can successfully exchange (send and receive) data packets with another host, and then judge the connectivity of the host according to the returned results.

Ping, Internet packet explorer, a program used to test the number of network connections. Ping is a service command working in the application layer of TCP/IP network architecture, which mainly sends ICMP (Internet message Control Protocol) Echo request message to a specific destination host to test whether the destination station is reachable and understand its related status.

Influencing factors:

In the case of physical link connectivity and correct routing settings, the screen is still not available with the Ping command, and there may be the following problems:

1. Ping the gateway as soon as the network cable is plugged into the switch, ignoring the convergence time of the spanning tree. Of course, newer switches support rapid spanning tree, or some administrators simply turn off the spanning tree protocol on the user port, and the problem is solved.

2. No matter how many nodes pass through the middle, as long as some nodes (including end nodes) filter ICMP packets, it is normal for Ping to fail. The most common is the behavior of firewalls.

3. Some router ports do not allow users to Ping.

4. Due to the timeout between devices, the ICMP message can not be received within the default time (2 seconds). The reasons for timeout are: the host does not have enough time and resources to respond; the path is too long, the value of TTL is 0 when it does not reach the destination, and the last router will send back ICMP timeout information; use extended Ping to increase the waiting time interval for reply, and so on.

5. The introduction of NAT will result in one-way Ping communication. NAT can play the role of concealing the internal address. When it is outside the inner Ping, it is possible to Ping because the mapping of the NAT table exists. When the host of the Ping intranet is initiated by the outside, it is impossible to find the NAT access list of the border router.

This is the end of the article on "what is the function of ping 127.0.0.1 in the computer". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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