What are the common network failures?

Network failures occur one after another, causing a lot of inconvenience to our work and life. The causes of various types of failures are different, and the solutions are also different. PHP editor Xinyi has carefully sorted out common types of network failures and provided corresponding countermeasures. Read this article to help you solve your network troubles step by step!

1. What are the common network failures?

Network faults mainly fall into the following categories:

1. Logical faults: There are two most common types of logical faults: one is configuration errors, and the other is that some important processes or ports are closed.

2. Configuration failure Configuration errors are also one of the important reasons for failures. Configuration failures are mainly manifested in the inability to implement various services provided by the network, such as the inability to access the Internet, the inability to access a certain proxy server, etc.

3. Protocol failure: Communication between computers and network devices is achieved by protocols, which play a very important role in the network. A protocol failure usually occurs when the computer can see itself and other computers in Network Neighborhood, but cannot browse the web or send and receive emails on the local area network.

4. Network administrator errors: Network administrator errors account for more than 5% of the entire network failures. They mainly occur at the network layer and transport layer. This is because the installation does not fully comply with the operating instructions, or the network administrator does not pay attention to a certain process. Caused by enough attention.

5. Mass storage problems: The main cause of data processing failures is hard disk problems. According to relevant reports, more than 26% of system failures are attributed to mass storage media failures.

2. Use wireshark to analyze common network faults?

Response problems: 1. A large number of retransmissions: It takes a long time for the other party to respond to the retransmission. Normally there is no retransmission: it may be due to network instability. The intermediate device captures packets to check the location of packet loss. A large number of retransmissions and dup acks.

Failed to establish a connection: (Take packet capture on the load balancing device as an example) 1. The server does not respond: (Performance L4 type VS, package client No. 6-9.

DOS problem: Due to the same source received by a single user at that time The DNS packets sent by the port peak at 125krps.

3. What are the common network fault detection tools?

After a network failure, the first thing to do is to diagnose the protocol failure, connectivity failure, configuration failure, and equipment failure. Or a DDOS attack. Find the source of the problem and then troubleshoot. Commonly used network fault testing commands include ipconfig, ping, tracert, netstat and nslookup. Network fault troubleshooting tools usually include hardware tools and software tools. Tools usually include: digital voltmeter, network tester, network tester, advanced cable detector, etc.

Software tools usually include: network monitor, network analyzer, etc.

Four. Common universal formulas for solving network faults. What are they?

Restart

5. What are the solutions to computer network failures?

This depends on your specific application scenario and the description of the failure

1. First find the cause of the failure in the lower right corner. Right-click on the network icon to troubleshoot and initially check the problem, try to repair it, or look at the problem prompts, such as IP conflicts, etc. For this, go online to check how to modify the IP or set it to a dynamic IP

2. If you have done so before, then proceed If it doesn't work, go check the router and optical modem, touch it with your hands to see if it's hot. If not, restart it. If possible, restart the computer as well

3. If it doesn't work, call the operator to ask. , to see if there is a problem with the line

4. If the previous steps are normal, enter the gateway, enter the login account and password of the router, enter the router to check, if there is no IP division or anything, if conditions permit, restart Set up the router

5. Check the lines to see if the network cable passes through high-power equipment. The operation of high-power equipment will also affect the transmission of network cable signals. In IDC computer rooms, strong and weak currents are generally separated.

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