1, some people use software such as P2P terminator, network law enforcement officer and jusheng network management to limit the speed of others.

2. Some computers are infected with ARP virus (due to the virus in the process of opening web pages and downloading), which attacks other computers and leads to disconnection.

3. Flood packet attacks and junk packets blocked the whole network in the intranet.

4. There is a conflict when someone changes IP in the intranet.

I suggest that you upgrade the network to an immune network with an immune wall, so that the network can be immune like humans and animals, and can resist feedback in time when encountering problems. The immune network also has network monitoring to monitor the internet access quality of the whole network. If there is any abnormal situation, it will directly intercept it from the network card and give an alarm during monitoring. It has nothing to do with others if a computer can't get online. The immune wall can directly intercept the virus attacks from each computer from the network card, limit the uploading, downloading and contracting size from the network card, and carry out unified management. There is only one network administrator, and it can also monitor the internet access status of computers in the whole intranet, the quality of internet access, the uploading and downloading of each desktop computer, the number of connections, and accurately locate the alarm if there is any abnormality, so that the whole network can see and touch it.