Win XP system is not a common network troubleshooting method

An abnormality in the network may have become the number one headache. Some common network problems can be solved, but if these exceptions are too special, I think many people are helpless. Now I will give it to everyone. Introduce these unusual faults.

Unconnected network cable shows connection enabled

Q: The windows xp system correctly recognizes the newly installed network card and installs the driver. In the case of no network cable connection, the network connection The "Local Connection" display is enabled and is in “Connected Status”. After connecting to the Internet cable and setting the corresponding parameters, the network access is performed, and IE displays “Unable to connect”. However, other computers on the same network can perform normal network access. Excuse me, what is the reason?

A: The cause of the fault is related to the network card. It is recommended that you use the following steps to troubleshoot the fault.

Replace the network card. Change the network card on the computer to another computer for testing, or change the network card of other connected computers to the computer for testing to see if the network card is faulty.

Reinstall the driver. Download the latest version of the driver from the official website of the NIC manufacturer and install it to see if it is caused by a driver incompatibility.

Replace the PCI interface. Swap the NIC into another normal PCI slot for testing to determine if the PCI slot is working properly.

Modify the BIOS settings. Upgrade the motherboard BIOS or set the BIOS to the system defaults.

The wireless router is not working properly

Q: I use the wireless router as the Internet sharing device in the home network. The WAN port is connected to the ADSL Modem, and the LAN port is connected to the desktop. Set to ADSL PPPoE access in the configuration wizard and specify the account and password. After setting up, I found that I could not access the Internet. Although my laptop can detect wireless signals, it can't access the Internet. However, I am directly connected to the ADSL Modem for dialing, but I can log in to the network normally.

A: The cause of the failure may be the following two aspects:

1. The client is bound to the MAC address. In order to avoid the user's use of the broadband router, the broadband service provider binds the computer's MAC address and account number together, and only the computer with the specific MAC address can achieve the Internet connection. If this is the case, you can use the MAC address cloning feature of the wireless router to clone the NIC MAC address of the computer that can dial ADSL.

2. The username and password are set incorrectly. If this is the case, check that the ADSL username and password in the wireless router are correct and that the settings are correct.

Can a wired network card and a wireless network card coexist?

Q: Can a wired network card and a wireless network card coexist on the same desktop computer? Can I use two network cards at the same time to access the Internet?

A: The wired network card and the wireless network card can coexist in the same computer without any influence on each other. It is possible to use two network cards to access LAN and telecom broadband respectively. The default gateway cannot be set in the IP address information of the network card connected to the local area network, and the IP address information including the default gateway should be set in the IP address information of the network card connected to the telecommunication broadband, so that the two connections can be simultaneously used.

You can still access each other without IP.

Q: Three computers use a switch to form a LAN. There is no DHCP server set up in the network, and no IP address is set for any one computer. Why are they still able to access each other?

A: This is because the computer will assign IP address information to achieve communication with each other. By default, the computer's IP address information is set to “ Automatically obtain an IP address”. When the computer with Windows 98/Me/2000/XP/2003 is powered on, the system will first find a DHCP server in the network to obtain its own IP address information from the DHCP server and configure the TCP/IP protocol. If the connection to the DHCP server cannot be established, the computer will use the APIPA automatic addressing mode and automatically configure the TCP/IP protocol. When using APIPA, the Windows system will automatically obtain an IP address in the range of 169.254.0.1 ~ 169.254.255.254, the subnet mask is 255.255.0.0, and establish a network connection with this configuration until the DHCP server is found.

Unable to perform infrared communication

Q: After using the infrared adapter to find the infrared device, xp should display an infrared icon in the taskbar, and there should also be an infrared communication sign on the desktop. However, I didn't see anything, and after right clicking on the file to be sent, the option to "send file to another computer" does not appear in the "Send to ” command, which prevents me from going to other infrared rays. The device sends the file.

A: This may be because you disabled a service called "Terminal Services" when doing Windows XP optimization. Just re-enable the service to resolve the issue. Open “Administrative Tools", go to “Services", find the <quo;Terminal Services> this service in the list on the right side of the "Services" dialog box that opens, open its properties window, and "Start" Type & rdquo; changed from the original “ disabled & rdquo; to “ manual & rdquo; and start the service, click the & ldquo; OK & rdquo; button and restart the computer to make infrared communication back to normal.