Here are some of the best LAN speed test tools for Windows 10 that you can use to know how fast is your LAN connection. Also, if you are a system administrator in your school and you want to test LAN speed, you can check out this article. for people who have multiple computers in their home or have access to in the office. Windows makes it easy to transfer files, share printer, etc. LAN or Local Area Network is a group of computers in your home or office that are connected to the same network.