Summary of problems with wireless network connectivity

Regarding the wireless internet is not smooth, the wireless network connection is not good question, this article has summed up many for everybody, and has provided the concrete breakdown description, the solution and so on. Hope that through this article, can make everyone convenient, simple to solve their own computer wireless fault.





Wireless network connection is not 1: Mixed wireless networks often fall off the line





fault phenomenon: Using Linksys WPC54G network card and Linksys WRT54G AP to build Wireless LAN, they are using IEEE 802.11g protocol, there are a few 802.11B network card. The line is often dropped when using wrt54g for 54mb/s connections.





Fault Analysis: Theoretically, the IEEE 802.11g protocol is a backward-compatible 802.11B protocol, and devices using both protocols can be connected simultaneously to AP with IEEE 802.11g protocol. However, from a practical point of view, as long as there is an IEEE 802.11B protocol in the network, the connection speed of the entire network will be reduced to 11MB/S (IEEE 802.11B Protocol transmission Speed).





Troubleshooting: When mixing IEEE 802.11b and IEEE 802.11g wireless devices, be sure to set the wireless AP into a mixed (MIXED) mode, which can be compatible with both IEEE 802.11b and 802.11g two modes.





Wireless network connection is not 2: The wireless client is not receiving a signal





failure phenomenon: After building a wireless LAN, the client is found not to receive the wireless AP signal. The wireless network has no signal.





Failure Analysis: There are several possible causes for this failure:





(1) wireless network card distance from the wireless AP or wireless router is too far, more than the coverage of wireless networks, wireless signal to reach the wireless network card has been very weak, so that wireless clients can not connect normally.





(2) The wireless AP or wireless router does not power up or does not work properly, causing the wireless client to not connect at all.





(3) When the wireless client distance from the wireless AP, we often use directional antenna technology to enhance the transmission of wireless signals, if the angle of the antenna has problems, will also lead to wireless clients can not connect properly.





(4) If the wireless client does not set the network IP address correctly, it cannot communicate with the wireless AP.





(5) For security reasons, wireless AP or wireless router will filter some MAC addresses, if the MAC address of the network card is filtered out, then there will be no wireless network connection.





Troubleshooting: You can use the following methods to resolve:





(1) installs the antenna on the wireless client to enhance the reception capability. If many clients are unable to connect to the wireless AP, install the omnidirectional antenna at the wireless AP to enhance the delivery capability.





(2) Check the LED indicator to see if the wireless AP or wireless router is working properly and use a portable computer for proximity testing.





(3) If the wireless client uses an antenna, try adjusting the direction of the antenna to the direction of the wireless AP or wireless router.





(4) Sets the correct IP address for the wireless client.





(5) To view the security settings of a wireless AP or wireless router, set the MAC address of the wireless client to a trusted MAC address.


Wireless network connection is not 3: The wireless client is able to receive the signal normally but the wireless network is not connected





Symptom: There is a signal but the wireless network is not connected





Fault Analysis: Wireless network has a signal why not connect? The cause of this failure may be:





(1) The IP address of the wireless AP or wireless router has been assigned. When a wireless client is set to automatically obtain an IP address, the wireless network is not connected because the IP address is not available.





(2) The wireless card does not have the correct IP address set. When a user sets the IP address manually, the wireless network connection is not available if the IP address set and the IP address of the wireless AP are not in the same network segment.





Trouble shooting:





(1) increases the address range of the wireless AP or wireless router.





(2) Sets the correct IP address for the wireless network card to ensure that its IP address is within the same network segment as the wireless AP.





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Article Summary: Wireless network is not connected, the problem may appear in many aspects, then, this article according to the different equipment situation, line situation, summed up a lot of wireless network connectivity problem solving methods.





Wireless network connection is not 4: The wireless network can communicate normally, but cannot communicate with the Ethernet connected with the wireless router





failure Phenomenon: Wireless clients can communicate with the wireless router normally, but cannot communicate with the Ethernet connected with the wireless router.





Failure Analysis: The cause of this failure may be:





(1) Local area network (LAN) port connectivity failure.





(2) IP address is set incorrectly.





Fault Resolution:





(1) checks the LAN port for the correct Ethernet connection by looking at the LANs LEDs. You should use a crossover line to connect LAN ports and Ethernet hubs.





(2) View whether the wireless network and Ethernet are in the same IP address segment, only the host within the same IP address segment can communicate.





Wireless network connection is not 5: When dialing a cordless phone, it will have a strong interference to the wireless network





fault phenomenon: Whenever a cordless phone is dialed, the wireless network signal becomes extremely faint, often resulting in link interruption.





Failure Analysis: Because cordless phones and IEEE 802.11b are all working on 2.4GHz bands, when dialing a cordless phone, it will have a strong interference with the wireless network.





Troubleshooting: The general solution is to stop using a cordless phone or to change the channel used by the wireless network.





Wireless network connection is not 6: When the network environment changes, can not be normal access





Fault: Wireless networks are built in both the office and home. While in the office, laptops can normally access the company's wireless network, but when they get home, they find they can't connect to the wireless network.





Failure Analysis: The cause of this failure may be the following:





(1) did not change the SSID (Service Set Identifier) configuration in a timely manner. Different wireless networks use different SSID and cannot ping the AP if the SSID is configured incorrectly. And the laptop will ignore the AP and look for a new AP based on the SSID configuration.





(2) WEP encryption. If a different WEP key is used, the wireless client cannot connect to the new wireless AP. If the WEP configuration is not correct, the wireless client cannot obtain the IP address from the DHCP server. If you use a static IP address, the wireless client cannot even ping the AP's IP address.





(3) IP address information. In general, wireless APs will automatically assign IP addresses to wireless clients, and if the IP address of the wireless client is set manually, then the client will not be able to communicate with the new AP.