Network Problem Problem 50, Network Problem Problem

Check the local connection configuration and check the IP configuration sheet to make sure that it is correct. (Check whether the default gateway and DNS are correct).

Cause 2): Virus issues (e.g. Internet Explorer Tamper Setting Virus, DNS Tamper Virus).

Solution: Kill the virus or reinstall the system.

Fault 2The authentication is successful, but the connection is frequently dropped.

Cause: Medium virus (e.g., ARP virus) or virus attack.

2. Restriction questions.

Fault 1: The MAC address is restricted.

Reason 1): The host or motherboard has been replaced, and the hardware device has been repaired.

Solution: Go to the Campus Card Center to register the change.

Cause 2): Medium virus.

Workaround: Kill viruses or restore the system.

Reason 3): The optimized version of the system or optimization software (such as Optimizer) is installed

Solution: Reinstall the system that is not optimized or uninstall the optimization software.

Fault 2: The IP address is restricted.

Cause 1): The IP address is incorrectly configured.

Cause 2): Medium virus.

Solution: Kill the virus or restore the system.

Cause 3): The authentication database system records a default IP address.

Solution: Call ** to the campus card center, or the network core equipment room, and clear the personal IP information.

Fault 3: The physical port is restricted.

Cause 1): The physical port of the wall used is not the port information bound to the authentication system.

Solution: Register the changes at the Campus Card Center or the New Library Network Operation Management Department.

3.Other types of questions.

Fault 1, Authentication switch cannot be found.

Reason 1): The medium virus IP was reported by the student or investigated by the network center, and the port was closed.

Solution: Check and kill viruses or reinstall the system, check by the student administrator to make sure that there is no problem, and unblock it in the network center. Reason 2): The computer comes with a hardware firewall.

Workaround: Turn off the hardware firewall.

Cause 3): The physical link is determined to be a physical link problem based on the test line.

Solution: Check the network cable, the physical port and the line from the switch side. Replace the network cable in time if the network cable is in trouble, and report the wall port problem to the network center.

Reason 4): If there is no problem with testing on the same port with another computer, it can be judged to be a local system or hardware problem.

Solution: Reinstall the system or replace the hardware device.

Cause 5): The NIC recognized by the authentication software is incorrect.

Workaround: Disable all network cards that are not in use.

Cause 6): The VSITA system comes with a virtual NIC system.

Solution: In the authentication software, select the same type of NIC in the local connection.

Reason 7): The certified software version is too low.

Workaround: Reinstall a client with a higher version.

Fault 2: Indicates that the user is being used.

Reason): Shut down the computer unexpectedly without exiting the certification.

Solution: Hit ** to the network center.

Fault 3: The certification certificate cannot be found.

Cause 1): Computer native setup issues.

Workaround: Open Local Connection Properties--- select the Verification tab--- Unenable Verification for this network Failure 4: RA not found

One is a broadband interface!! One is the interface of the network card. You uninstall both of these drivers in safe mode. Then install these two drivers. That's it.

First, tell me first, did you make a successful dial on your optical modem?

Second, whether the router is connected to the optical modem.

Hello, dear, I'm glad to answer the question for you, the first step: check whether the computer network interface is normal, plug the network cable that can access the Internet normally in the same dormitory into your computer network interface, if the network interface light flashes normally, it proves that the network interface is normal; Step 2: After confirming that the network interface is normal, plug in the network cable computer with a red cross in the lower right corner of the computer, at this time, check whether the wall information point to the computer connection network cable is damaged, and can be detected by replacing the network cable.

Step 3: Based on the above two steps, there is still a red cross in the lower right corner of the computer, which may be caused by a fault from the wall information point to the switch, and you need to contact the network administrator for maintenance.