How to use the Ping command to check the reason why you can't access the Internet?

This article will discuss with you how to use the Ping command to check the reason why you can't access the Internet. Some users found that the computer could not connect to the network after booting, so they called up the DOS window. Tested by the Ping command, it is quickly determined that the fault appears on the router. Then check the router and find that the fault is caused by the disconnection of the network cable connected between the router and the external network. After reinserting the network cable, the problem is solved.

There are several reasons why a computer can't access the Internet: the system's IP settings, network card, MODEM, and line faults. To troubleshoot hardware and line problems, we can use the Ping command to quickly detect network conditions.

First, we click on the start of the system, enter the cmd command in the run bar, the DOS window in the operating system will pop up, where we can input various DOS commands intuitively and conveniently.

Computer left - Start - Run - type CMD then determined, we can lose Ping127.0.0.1 the address in DOS is the local loop address, this address can not be found Ping through, it indicates that the local The TCP/IP protocol does not work properly, so please reinstall the TCP/IP protocol. Type the command to determine if the TCP/IP protocol is normal. If the above operation is successful, you can ping through, we can enter IPConfig to view the local IP address, and then ping the IP is its own IP, the general rule indicates that the network card or MODEM is working properly, the network adapter is faulty.

Typing instructions to determine the status of the network card or MODEM ping your own IP has a counter-return value indicating that the network card and MODEM are normal and then ping the IP of the default gateway, before pinging the default gateway, check whether the router settings allow ping gateways. Check the firewall settings to allow pinging and pinging? After checking these, we start to ping the default gateway. If there is no problem with this line, check if the network cable and router are working properly. Ping the default gateway to determine if the local to route is normal.

Finally, the detection of a network with DNS service, simply means that ping a Web site, such as the return value will appear under normal circumstances www.45it.com Ping, DNS indicating that the machine is set up correctly And the DNS server is working fine, that is, I said that our machine can connect to the WAN.