What are the ten common network failures?

Ten common network faults: 1. The network adapter settings conflict with computer resources; 2. There are two network segments in the LAN, and all computers in one network segment cannot access the Internet; 3. The entire All computers on the LAN cannot access the Internet; 4. Except for the server, other client computers on the LAN cannot access the Internet, etc.

Ten common network faults:

1. Fault phenomenon: network adapter (network card) settings and computer There is a resource conflict.

Analysis and Troubleshooting: Avoid conflicts with other computer resources by adjusting the IRQ and I/O values ​​in the network card resources. In some cases, it is necessary to adjust the conflict with other resources by setting jumpers on the motherboard.

2. Fault phenomenon: Other client computers in the LAN can see each other on "Network Neighborhood", but only one computer cannot be seen by anyone, and it cannot see other computers. (Premise: The LAN of the Internet cafe is connected to a star network structure through a HUB or switch)

Analysis and troubleshooting: Check whether the computer system is working normally; check the network configuration of this computer; check this computer Check whether the network card is working properly; check whether the network card settings on this computer conflict with other resources; check whether the network cable is disconnected; check whether the network cable connector is in normal contact.

3. Fault phenomenon: There are two network segments in the LAN, and all computers in one of the network segments cannot access the Internet. (Premise: The Internet cafe's LAN connects two network segments through two HUBs or switches)

Analysis and elimination: The trunk lines of the two network segments are broken or the connectors at both ends of the trunk line are poorly connected. Check the settings of the network segment in the server.

4. Fault phenomenon: All computers in the LAN can see each other on "Network Neighborhood". (Premise: The LAN of the Internet cafe is connected to a star network structure through a HUB or switch)

Analysis and troubleshooting: Check whether the HUB or switch is working properly.

5. Fault phenomenon: A certain client computer in the LAN can see the server in "Network Neighborhood", but cannot access the Internet. (Premise: The server refers to the computer that acts as an agent for the Internet on other guest machines in the Internet cafe LAN, the same below)

Analysis and troubleshooting: Check the TCP/IP protocol settings of this client, and check the IE browsing in this client Server settings, check the server settings for this client.

6. Fault phenomenon: All computers on the entire LAN cannot access the Internet.

Analysis and troubleshooting: Whether the server system is working normally; whether the server is offline; whether the modem is working normally; whether the central office is working normally.

7. Fault phenomenon: In the LAN, except the server, other clients cannot access the Internet.

Analysis and Troubleshooting: Check whether the HUB or switch is working normally; check whether the network part (including: network card, network cable, connector, network configuration) connecting the server to the HUB or switch is working normally; check whether the agent on the server is connected to the Internet Whether the software starts and runs normally; whether the settings are normal.

8. Fault phenomenon: When dialing up to access the Internet, MODEN has no dial-up sound, cannot connect to the Internet, and the indicator light on MODEN does not flash.

Analysis and troubleshooting: whether the telephone line is busy; whether the connection (including: connections, connectors) of the server connected to MODEN is normal; whether the telephone line is normal and whether there is any noise interference; whether the dial-up network configuration is correct; MODEN's Check whether the configuration settings are correct and check whether the tone or pulse mode of the dial tone is normal.

9. Fault phenomenon: The system cannot detect MODEN (if MODEN is normal).

Analysis and troubleshooting: Reinstall MODEN and pay attention to the correct location of the communication port.

10. Fault phenomenon: The connection speed to the Internet is too slow.

Analysis and troubleshooting: Check whether the port connection speed set in the "Dial-up Network" of the server system is the maximum value set; whether the line is normal; the connection speed can be improved by optimizing the MODEN settings; by modifying the registration The table can also improve the Internet speed; whether there are many clients surfing the Internet at the same time; if there are many, it is normal for the connection speed to be too slow.

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