(What kind of technical personnel is this course aimed at? A practical textbook written by network experts for network construction and management personnel. The purpose is to combine network theory with practical use, improve the ability of engineers and technicians to analyze and deal with specific problems, turn what they have learned into use, and turn book knowledge into operational technology. IP address checking tool IP address calculating tool MAC address obtaining tool IP/MAC summarizing tool IP address is the main symbol for computers to communicate with each other in the network. It is the same as the host name and is unique in the local area network. In a large-scale network environment, there are many clients. It is obviously impossible to accurately remember the IP address of each computer, especially in a network with a DHCP server. IP addresses may all be different, and there are no rules to follow. Here are some useful tools to quickly check your IP address.)