Symptom:
When Windows 8 is connected, "Unrecognized Network" appears.
Cause analysis:
First, dial-up Internet
Direct dial-up Internet access failure, the machine can not obtain an IP address (broadband connection is the use of PPPOE protocol to connect to the external network, the local connection is using TCP /IP protocol The physical connection of the local connection is correct when dialing, but the local area network IP assigned by the upper device may not be obtained. The prompt is unable to access the Internet. The network card has a problem, the system has a problem, the driver has a problem, and the cat has a problem.
Second, connect the router to the Internet
Connect the router to the Internet, this prompt, prove that the machine has obtained the IP address (the internal network has been connected to the normal, but can not access the external network), the system is faulty, the router is faulty, the network cable is faulty, The cat is faulty.
Solution:
1. Dial-up Internet
1. Update machine network card driver (Lenovo official website download update)
2. Check whether the machine network card settings are normal (Control Panel---Network and Internet-- - Network and Sharing Center)
3. Start---Run---cmd (ipconfig/release releases the existing ip address) (ipconfig/renew regains the new ip address)
4. Check if the network cable is Unicom, the cat indicator is normal (a total of 4 indicators, 3 are always on, one is blinking is normal)
5. Call the customer (Netcom 10010, Telecom 10000) to check whether the arrears, the external network is connected
Second, the router Internet
1. Restart the router, if the fault persists after rebooting, log in to the router management interface, check whether the settings are correct (the back of the router has the login IP address, the password default admin or password)
(1) Digital China /ASUS: Username: adsl Password: adsl1234
(2) Datang User Name: admin Password: 1234
(3) ZTE User Name: adsl Password: adsl831
(4) ZTE adsl841 (default IP :192.168.1.1) Username: admin, password: private
(5)TP-LINK TD-8800 Enter 192.168.1.1 in IE User name admin, password Admin.
(6) Routing brand name: viking Account: adsl Password: adsl1234 (account: root password: grouter)
(7) Routing brand name: mt800 Account: admin Password: admin< Br>(8)Route brand name: home gateway Account number: user Password: password
2. Complex router factory settings and re-configure Internet
Example: Huawei SmartAX MT800 initial IP is 192.168.1.1 User name and password are ADMIN, there are two ways to restore the default configuration. One is to press the RESET button on the back of the MODEM three times, and the other is to restore the default configuration in SAVE&REBOOT in the configuration menu.
3. Check whether the network cable is connected, whether the cat indicator is normal (a total of 4 indicators, 3 are always on, one is blinking is normal)
4. Call the customer (Netcom 10010, Telecom 10000) to check whether the fee is owed. Whether the external network is connected