How to use the ipconfig command correctly

Title: In-depth understanding of the ipconfig command format and its purpose

The IPCONFIG command is a utility tool in the Windows operating system that can be used to view and manage network connection information. Its format is very simple, just type "ipconfig" in the command prompt and press enter. This article will introduce the format of the ipconfig command and some common uses it provides.

1. Basic format
Enter the "ipconfig" command in the command prompt window to obtain detailed information about the currently active network connection. This information includes IP address, subnet mask, default gateway, DNS server, etc.

2. Specific purposes

1. Check the IP address: After entering the "ipconfig" command in the command prompt window, the system will display the IP address currently used by the machine. This is useful for ensuring you are connected to the network and getting a valid IP address. If the system is configured with multiple network adapters, this command will also list relevant information for each adapter, such as Ethernet adapter, wireless adapter, etc.
2. View the subnet mask: The subnet mask is part of the information used to determine the network address and host address. Through the ipconfig command, you can easily view the subnet mask used by the current system and use this information to better understand the network topology.
3. View the default gateway: The default gateway implements Internet communication by redirecting data packets to hosts on other networks. Through the ipconfig command, you can view the default gateway set in the current system and ensure that it is configured correctly. This is critical to ensure proper functioning of network communications.
4. View DNS server: DNS server is used to resolve IP addresses into identifiable domain names. Through the ipconfig command, you can check the DNS server address currently used by the system. This is very helpful for troubleshooting network connection issues and adjusting network settings.
5. Refresh DHCP: DHCP is a dynamic host configuration protocol used to automatically assign IP addresses and other network configuration information. Sometimes, we may need to manually refresh the DHCP configuration in order to obtain a new IP address or update other network settings. By using the "ipconfig /renew" command at the command prompt, the system will re-request the configuration information from the DHCP server.
6. Clear DNS cache: Sometimes the DNS cache may contain expired or unnecessary information, causing network connection problems. Through the "ipconfig /flushdns" command, you can clear the local system's DNS cache to re-obtain the latest DNS records.
7. Show detailed information: By using the "ipconfig /all" command, you can display more detailed network connection information, including physical address, DHCP lease information, DNS cache, etc. This is useful for network troubleshooting or detailed network configuration.

Summary:
By understanding the ipconfig command format and its uses, we can better manage and maintain network connections. Whether it is to view the IP address, subnet mask, default gateway and DNS server, or refresh the DHCP configuration and clear the DNS cache, the ipconfig command provides us with a convenient method. An in-depth understanding and good use of the ipconfig command is crucial to solving network problems and optimizing network connections.

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