1, the network itself has a problem (the server bandwidth is insufficient or the load is too large);
2, network cable problems lead to network instability (twisted pair substandard performance is:
1) The network was very unstable when it was first used;
2) The network speed was normal at first, but after a while, the network was unstable);
3) The existence of loop in the network leads to network instability.
3. Network instability caused by broadcast storm caused by hardware failure of network equipment;
4. One port in the network forms a bottleneck, which leads to network instability;
5. The influence of worm virus leads to network instability;
6. Excessive use of firewalls;
7. Insufficient system resources: The poor network is mainly caused by the above reasons. Personal suggestion: first clean up the garbage process of the computer and optimize the system; There is also a Trojan horse, which is one of the important reasons for the instability of the network.
8, check the network, if in the local area network, the bandwidth is too serious (download things) may also cause network instability.
The solution to the above network instability is:
First, please change the time or change the target website;
Second, check whether the twisted pair is qualified;
Thirdly, the loop fault is eliminated step by step by using the method of partition and segmentation;
4. Test the involved computers one by one with the "Ping" command under DOS. Network cards, hubs, and switches are the most prone to failure and slow down the network speed.
5. The anti-virus software used must be upgraded in time; Computers should also upgrade and install system patches in time, uninstall unnecessary services, and close unnecessary ports to improve the security and reliability of the system.