Shulou(Shulou.com)06/03 Report--

What are the methods to detect whether IP is occupied? For this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more small partners who want to solve this problem find a simpler and easier way.

1. ARP cache method.

Firewalls and packet filtering methods also do not prohibit ARP checking, remote computers do not return a successful Ping message, but notify the local computer of the corresponding MAC address. This can be viewed through ARP cache information. If the IP address corresponds to the MAC address, the computer is online, and the MAC address does not appear in the ARP cache table, indicating that the computer is not online. First, according to the above ping method, check whether the IP address on the computer is online. If the ping returns invalid information, enter arp-a in the command prompt to check the local ARP cache list to see if the corresponding IP has MAC address information.

2. PING method. The easiest way to check if a computer on a network is online is to ping the computer's IP address.

For example, if you want to check if the 192.168.1.1 computer is online. Click Start/Run and enter cmd to enter the command line command prompt. In command line mode, enter ping192.168.1.1. If the ping passes, the computer corresponding to the IP address has.

3. Batch processing method.

Based on the above principle, batch processing method is established, and batch inspection is carried out in local area network. For example, look at 192.168.1.* The online address of the segment. Right-click to create a new text file on the desktop and type FOR/L%iIN192.168.114.% i-n1arp-a->IP.txt(0，1，255)。

4. Save the bat file.

Double-click on the batch file and you will automatically search for all IPs in the page section and save the ARP information found in the ip.txt file. If you return the MAC address, you will be online.

The answers to the questions about detecting whether IP is occupied are shared here. I hope the above content can be of some help to everyone. If you still have a lot of doubts, you can pay attention to the industry information channel to learn more about it.

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