What does network maintenance mainly do?

What exactly does network maintenance do?

Network maintenance is, first of all, you have to ensure that your network can run normally. For example, a school LAN, you must first ensure that it can meet the needs of customers, so that customers can use the network and work normally. There are also security issues. You should prevent hackers from invading and stealing important information from customers or others.

At least to understand the basic knowledge of computer network, you can take courses such as computer network technology, network planning and design, university computer, network engineering and so on.

Network maintenance generally needs to do:

Hardware cleaning, often cleaning hardware, keeping hardware clean, effectively protecting vulnerable hardware such as hard disk, and prolonging computer life.

Provide system upgrade scheme and network implementation service;

Hardware installation, debugging, maintenance and fault detection and troubleshooting services;

Installation, debugging and service of network server.

Computer hardware maintenance, computer system recovery, computer network maintenance and debugging, computer technology consultation, system integration, etc. , local area network construction.

Maintenance of computer software

Information consultation of new computer system;

Technical services of related system software;

Installation (upgrade), debugging and maintenance of various system software;

Professional system optimization;

Professional virus detection and antivirus.

Provide free guidance to computer managers on important operating procedures to improve their computer application level.

Maintenance of the system

Virus prevention and cure virus is the killer of computer system, which can infect application software, destroy system and even hardware, so it must be killed in time.

Data backup Data backup is the access to data such as hard disk parameters, computer boot area parameters and system components, so as to restore the normal work of the computer in case of major failure.

Data sorting often sorts out computer data, removes useless data, repairs wrong data and maintains the stability of the system.

Troubleshooting If there is a fault, find and eliminate it in time to avoid a bigger fault and cause greater losses.

website maintenance

Update the content of the website page;

Update and maintain the website database;

Update and maintenance of website structure and function module;

Network server maintenance.

[Maintenance responsibility]

Ensure the normal operation of the network workstation;

Responsible for computer installation and debugging, including software installation and upgrade;

Collect users' opinions and suggestions on this website, and reply or feedback in time;

Training and assessment of online managers of websites at all levels;

Collect social feedback on information products and technical requirements;

Ensure the security of the computer system.

What does network maintenance mainly do?

Simply put, the work of a network administrator mainly includes three aspects: network construction, network maintenance and network service. 1. Management of network equipment Management of network equipment is the focus of network management. To manage network devices, we must know how the network is physically connected, how the terminals in the network exchange visits and communicate with another terminal, and how to deal with the differences in speed and bandwidth. How to link and communicate with the same network. To solve these problems, we must first understand routers, switches, gateways and other equipment. Network systems are connected with network adapters (also called network cards) through specific types of transmission media (such as power, optical cables and wireless media), and are monitored and managed by the network operating system. The network administrator's management of network equipment is mainly the management of routers, switches and lines. 2. The management server of the server is a special computer, which is a high-performance computer that provides various services for the terminal computers in the network. Under the control of the network operating system, it provides connected hard disks, tapes, printers, modems and special communication equipment to client sites on the network, and also provides centralized computing, information dissemination and data management services for network users. Generally speaking, it is necessary to establish multiple servers in a network to provide different service requirements. Generally speaking, there are the following types of servers needed in a network: WEB server, email server, FTP server, DNS server, proxy server, database server, etc. 3. There are many resources in the resource management network, such as IP address resources, domain name resources and disk resources. Only by managing these resources well can the network provide better services for users. 4. User management is to add or delete users, grant users certain access rights, and allocate different levels of resources to different users to ensure network security.

What is the work content of network maintenance, detailed?

Main work contents of network maintenance (routing to PC):

(1) Responsible for the maintenance and management of the company's local area network and computer software and hardware to ensure normal operation; (2) Responsible for the maintenance of the company's CRM system to ensure the normal operation of the system and complete confidentiality of information; (3) Be responsible for updating and maintaining the company's website and regularly optimizing it to ensure the safe operation of the company's website and maintain a good corporate image; (4) Responsible for the construction of online communication platform for students and the planning and construction of member forums.

Technically, we should be proficient in various operating systems and related network operating environments, and be proficient in network settings and security maintenance; Familiar with network integrated wiring and server construction; Have the ability to analyze and deal with network faults independently. Familiar with web page making skills and ASP language. If you can skillfully use SQL database, the management database will be more perfect.

What is the main work of network maintenance? What exactly are there? Ask a master for advice

Network maintenance is to ensure the normal transmission of the network; Master the layout of the company or network/optical fiber network wiring cabinet, the configuration of equipment and the changes of configuration parameters, back up the configuration files of each equipment, and be responsible for the management of network wiring distribution frame to ensure reasonable and orderly wiring; Master the internal network connection, so as to quickly find the problem and locate it; Master the connection configuration with the external network, supervise network communication, and contact relevant institutions in time after finding problems; Real-time monitoring the operation and communication flow of the internal network of the whole company or Internet cafe. For common network faults, such as machine crash and restart, CPU temperature is too high; This machine has a virus; There is something wrong with the operating system or power supply. These faults are obvious and easy to judge and solve. However, many faults are hidden. This fault is like this. Let's take a look at its analysis process. The webmaster learned that there is a machine in the network, which is extremely slow and intermittent, and sometimes the webpage can't be opened. He came to deal with it as soon as he received the notice. He first ping the file server of the network and found that the return time was very slow, usually reaching several hundred milliseconds, and sometimes even overtime. It seems that this is a typical network interference problem. He checked the network configuration and network card and found nothing wrong. The problem must be the network cable or network interface. But the network cable was newly made in the morning, so it should be no problem. Therefore, the switch interface was tested, and no abnormal phenomena such as packet loss were found. It seems that it should be a network cable problem, and the test results with instruments also show that it is a network cable problem. He wants to know that the crystal head and thread are all new. How come... He inspected the crystal head below and found that the copper sheet on the crystal head was oxidized to black. It seems that the fault should appear here. After removing the oxide layer with a knife, reconnect the twisted pair to the switch, and the fault has been solved. But how can the new crystal head be oxidized? Later, it was found that there was a rice cooker under the cabinet, where the crystal head was placed. Oh, it turned out that the copper sheet of the crystal head was oxidized by cooking steam. This incident also reminds us that we can't ignore the influence of the environment on network equipment and devices. Fault analysis of slow network speed. Among many network failures, the most troublesome thing is that the network is on, but the network speed is very slow. When encountering this kind of problem, people are often at a loss. The following are the common causes and troubleshooting methods of this kind of fault. Network cable problem. Twisted-pair cable is composed of four pairs of wires tightly and reasonably wound together to reduce the influence of background noise. However, the network cable that is not made according to the correct standard has great hidden dangers. Some of them started to work normally, but after a period of time, their performance declined and the network speed slowed down. Circulation problem. Generally, this situation rarely happens when the network scale is small, the number of nodes involved is small and the structure is not complicated. However, in some complex networks, it is easy to form a loop, and data packets will continue to send and check data, thus affecting the overall network speed, and it is difficult to find. In order to avoid this situation, it is required to develop good habits when wiring. Broadcast storm. As the main means of discovering unknown devices, broadcasting plays a very important role in the network. However, with the increase of the number of computers in the network, the number of broadcast packets will increase dramatically. When the number of broadcast packets reaches 30%, the network transmission efficiency will decrease obviously. When the network card or network equipment is damaged, broadcast packets will be sent continuously, which will lead to a broadcast storm and paralyze network communication. Port bottleneck. In fact, the router's WAN port, LAN port and server network card may all become network bottlenecks. Network administrators can use network management software to check the data flow of routers, switches and server ports during the peak period of network use to determine the location of network bottlenecks and try to increase their bandwidth. Worm virus. Worm virus has more and more serious influence on network speed. This virus causes infected users to keep sending emails as long as they are connected to the Internet. The virus randomly selects documents from the user's computer and attaches them to random addresses in the user's address book to send emails. Spam is queued up and some of it is returned to the server in batches. As a result, individual backbone Internet appears obvious congestion, and local area network is almost paralyzed. Therefore, administrators should always pay attention to various new virus announcements and understand the characteristics of various viruses; Upgrade the anti-virus software used in time and install system patches; At the same time, unnecessary services are uninstalled and unnecessary ports are closed to improve the security and reliability of the system. Both network management and software and hardware fault analysis need solid network technical knowledge accumulation and rich troubleshooting experience, so administrators need to constantly learn to enrich themselves. & gt

What do China mobile network maintenance personnel mainly do?

Equipment monitoring, troubleshooting, board replacement, possible network performance analysis, etc.

What should be paid attention to in company network maintenance?

Mark it for easy maintenance. Because there are relatively many computers and network lines in the enterprise LAN, if something goes wrong, I don't know which line to connect. So mark the network connecting the computer and the router, which host is connected to the router and which port is connected to the router on the computer, which is convenient for maintenance. 2. Provide a good working environment for enterprise routers. In the instruction manual of the enterprise router, the manufacturer has made clear the environmental indicators for the normal operation of the router, so the enterprise should try its best to provide the enterprise router with a working environment that meets the environmental indicators specified by the manufacturer, otherwise it will affect the normal operation of the router and may even damage the router. Generally, attention should be paid to power supply voltage, working temperature, storage temperature, working phase humidity, storage relative humidity, etc. Pay special attention to moisture and heat protection. Because enterprise routers are composed of many compact electronic components, these electronic components will be short-circuited due to moisture, so they must be placed in a dry place. Especially in the rainy season, we should pay more attention to keeping the working environment of enterprise routers dry. In addition, because the chip of the equipment will emit a lot of heat during the operation of the enterprise router, if it is not emitted in time, the heat of the chip may exceed the index range, which may lead to the abnormal operation of the enterprise router. So it is best to put the router in a ventilated and dry place. Do not cover the router with decorative cloth or pile books and sundries around the router. Let the router take a good breath. 3. Anti-electromagnetic interference data will be affected by many factors in the transmission process, and electromagnetic interference is one of the main aspects. For example, speakers, wireless transceivers and other devices are too close to the enterprise router, and network signals may be affected by external radiation, so try to put the enterprise router in an independent place, away from those devices that will produce electromagnetic interference. 4. When the enterprise router is powered on, don't plug it in or out at will. When the router is powered on, try not to plug it in or out with electricity, because such an operation can easily cause circuit damage. Although many manufacturers of enterprise routers have taken certain protective measures, they still need special attention to avoid unnecessary damage to enterprise routers. 5. Take measures to prevent lightning strikes. Minefields are not uncommon in China. Taking Guangzhou as an example, the average thunderstorm weather can reach 80.3 times a year, so the number of router users who are struck by lightning is also quite large. According to the investigation and analysis of engineers of Qno SINO Technology, 30% of network equipment failures are directly related to lightning strikes. Although in many cases, the induced voltage generated by lightning can not be fully reimbursed to the enterprise router at one time, even if there was no network failure at that time, if the enterprise router was often impacted by overvoltage, it would easily lead to the aging of the router equipment components, greatly shortening its service life, and it would be more vulnerable to damage for the old enterprise router. In this case, if there is no corresponding grounding protection measures, enterprise routers are easily damaged by natural disasters such as lightning strike, which seriously affects the stable operation of the network. Therefore, enterprises should take lightning protection measures, and enterprise users can do lightning protection by grounding their equipment and installing effective lightning protection systems. 6. Preventing power outages In today's "power panic" situation, it has long been common for commercial electricity to limit electricity for enterprises, and in the process of power supply, it will be intermittent due to insufficient voltage, and the power supply will be high and low (the voltage is too low, such as 150V or less; Or too high, such as higher than 260V), and the power supply is often unstable, which easily leads to the router equipment in the enterprise network can not work continuously and normally. If enterprise routers often work in this abnormal power supply environment, it will not only seriously affect the quality of service provided by routers for enterprise networks, but also greatly shorten the service life of enterprise routers in the long run. Therefore, the best way to ensure the "stability and longevity" of enterprise routers is to equip enterprise routers with a set of UPS power supply system with excellent performance and stability. UPS power supply can effectively solve the problems existing in the power grid, such as power failure, lightning surge, surge, frequency oscillation, voltage mutation, voltage fluctuation, frequency drift, voltage drop, pulse interference and so on. If the enterprise router is equipped with UPS power supply system, there is no need to worry about the router being damaged due to voltage instability or sudden power failure. 7. When the enterprise router is hit, try to avoid collision and impact ... >>

What does the university network maintenance center do?

Network equipment maintenance center

Responsible for the daily maintenance and localization management of network equipment (except public equipment) in LAN. Under the leadership of the network operation and maintenance department, under the command and dispatch of the network management center, according to the network operation and maintenance procedures, as well as the company's various rules and regulations and production processes, the work content of network operation and maintenance is implemented to ensure the safe and smooth operation of related networks, the stable and efficient operation of equipment and the safety of network information.

1, responsible for opening business circuits for group customers, providing important communication guarantee for important customers, and maintaining industrial application client equipment.

2. Responsible for the operation and maintenance of video conference (including video communication) business and related network equipment, as well as the guarantee service during video conference.

3. Responsible for the operation monitoring, routine maintenance and troubleshooting of switching (including intelligent network, mobile core network circuit domain, mobile core network packet domain, signaling network, PSTN switch, module office, V5 access network, hotel switch and attendant console equipment, fixed-line soft-switching equipment, wireless local telephone core network), transmission, power, basic data, Internet and other network equipment, and responsible for the safety management of the computer room.

4. Be responsible for formulating and implementing the daily maintenance and operation plan of network equipment such as exchange, transmission, electric power, basic data and Internet, and completing various maintenance tasks and operation and maintenance assessment indicators.

5. Responsible for the safe operation of power supply system, air conditioning system, fire protection system and environmental system equipment except the base station side.

6. Responsible for monitoring the environment of each computer room, ensuring the environmental requirements of the communication computer room in terms of temperature, humidity, cleanliness, etc., responsible for lightning protection and grounding of the stations and equipment of the communication bureau, and improving communication.

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The protective ability of the equipment ensures the safe operation of the equipment in the computer room.

7. Be responsible for analyzing the operation quality of the maintained communication equipment, and regularly report the operation of the equipment and network to the superior.

8. Prepare plans for overhaul, renewal and transformation of network equipment such as exchange, transmission, electric power, basic data and Internet, and organize their implementation. Implement potential tapping, innovation and technical transformation of fixed assets of various professional equipment.

9, responsible for the local network area, county (city) exchange, transmission, power, basic data, Internet and other network equipment maintenance technical support.

10, responsible for joint examination, cutover, promotion of expedited projects and expansion of plug-in boards of various professional projects,

1 1, responsible for the daily management of the resources and assets of the maintained equipment.

12. Responsible for implementing the management system and methods of maintenance and maintenance, and conducting on-site supervision and assessment on the maintenance and maintenance units in the region.

13, implement standardized management of documents such as technical data and original records of network equipment operation and maintenance.

14, responsible for organizing all-professional technical training for local network equipment maintenance.

15. Cooperate with the network management center to complete the formulation and implementation of emergency communication plan and communication control plan to ensure the safe operation of communication equipment.

Ask what you need to do to maintain the hotel network.

You need to know how to set up a proxy server, set up a route, check the network failure, clamp the network cable yourself, and handle the general computer hardware failure. If you have a reduction card or something, you can relax.

Can install and use all kinds of commonly used software, it is best to have a computer operation manual written by you in the guest room, otherwise a phone call for five minutes will kill you and meet some unreasonable demands of the guests (if you want to help him * * *).

Some guests will bring their own notebooks, so you should be familiar with various settings (such as 1394, Bluetooth, wireless network card and the installation and use of dial-up cats). If you don't know, you are not far from being fired.

If you have a good temper, you should be prepared to suffer indignities at any time when you do it in a hotel. Even if the guests scold your ancestors for eighteen generations, you should keep smiling. Before entering the guest room, you should ring the doorbell or knock on the door, and say softly, "Hello, I'm XX waiter …". When you leave, don't turn around and leave. Go out like a minister. ...

Almost, of course, some hotels are not so strict, but it doesn't mean that network maintenance is just a network. As long as everything related to computers is on you, all you have to do is call the housekeeping department of the computer room. If the management of the computer room is loose, you can play two games when you are free, but don't use the server or database computer to play, or you will die.

In short, this job has its ups and downs. If the hotel's equipment is relatively new, the operation is stable, and the preliminary work is done well, it is still very easy. If you do well, you will get some tips or gifts, and any big boss may dig you up with a high salary.

What does IT network maintenance usually do ~,

Network maintenance can be divided into hardware maintenance and software maintenance. The hardware is switches, roadshows, firewalls, regular detection lines, terminals, and almost everything that can play an online role is summarized in the network. As for software, the first is the setting of software firewall, the security and update of server, and the security and setting of terminal.

What is network maintenance?

Disassemble two parts: network maintenance

Network: In layman's terms, multiple computers or servers or peripherals are connected together with network cables or even switches and routers to form a network.

Maintenance: Your job is to ensure that they work normally and solve problems when they occur.

The so-called network maintenance has different opinions, and there is no way to make it clear here. In fact, the simplest understanding is divided into hardware maintenance and software maintenance.

Hardware is nothing more than switching, routing, firewall, periodic detection of lines, terminals, and almost everything that can play an online role is summarized in the network.

As for software, the first is the setting of software firewall, the security and update of server, and the security and setting of terminal.

With the popularity of the Internet, everyone has a certain understanding of the network, but they may encounter some problems in their daily use. The following are some specific problems to solve your urgent needs in network use.

1. 1. Production of network cable (twisted pair): There are two standards for the production of twisted pair, 568A and 568B, and the 568B standard is commonly used in daily life. The color order of 568B standard is as follows: 1- orange white, 2- orange, 3- green white, 4- blue, 5- blue white, 6- green, 7- brown white, 8- brown (orange-green can be interchanged and orange-white-green can be interchanged in 568A standard). Cross lines are made on the basis of straight lines, ensuring orange-green correspondence and orange-white-green-white correspondence (it can be understood that one end adopts 568A standard and the other end adopts 568B standard); In addition, there are special requirements for the production of 100 megabit network cables, which will not be introduced here. Commonly used Category 5 or Super Category 5 lines only use two pairs of twisted pairs, namely 1, 2, 3, 6 in the line sequence.

Four lines (orange white, orange, green white, green), it is worth noting that these four lines must be twisted in pairs, otherwise it is easy to cause packet loss, resulting in reduced speed or impassability.

2. After the network cable is completed, another main problem is to test the network, thus introducing the application of Ping command in practical work.

Complete command: ping IP [-t] [-a] [-n count] [-l size] [-f] [-I TTL] [-V TOS] [-R.

Count][-s count][-j host list ]|[-k host list ][-w timeout]

Target_name, in order to avoid plagiarism, I won't introduce it in detail here. The specific usage can be found on the Internet. This paper only briefly introduces the actual work.

Non-network administrators usually check the most commonly used parameters of the network are [-t] and [-a]. You can use the following methods to check whether the network is connected and whether the network card is installed correctly: first, Ping 127.0.0. 1.

Check the network loop; Second, Ping the local IP address to check whether the network card installation settings are intact; Third, Ping the IP addresses of other computers in the same disconnected network to check whether the network cable is connected properly and whether the whole network is unblocked; The last thing to check is the DNS of Internet access providers (some access providers prohibit Ping

The IP address of the DNS server (this is worth noting) or the gateway, and check whether the Internet connection is intact.

A. The network card is not installed correctly or there is something wrong with the network card itself. Generally, the network card is plugged in, and the system does not prompt, indicating that the network card is not plugged in or the interface has problems; After installing the driver, the Ping loop is correct, but the Ping of your own IP is not available. First, check whether there is a problem with the network card; Ping The local IP is connected, but the neighboring computers cannot communicate. First, check whether there is a problem with the network cable or network card interface. The best way to detect network cards is the replacement method, that is, the problem network card replaces the normal network card of the same model. Before using the replacement method, it is best to check whether the local network card is inserted correctly and try another slot.

The question of the b.TCP/IP Agreement. One problem is that computers can't communicate with each other, which is mostly caused by TCP/IP protocol. Because the TCP/IP protocol itself is very fragile, it is easy to lead to poor communication, which is generally manifested in the inability to communicate between adjacent microcomputers (no online neighbors or search computers can be found); In some cases, although the Internet can be connected normally, adjacent microcomputers can't communicate with each other, which is a common problem of some Win98 systems. The solution to this problem is to add TCP/IP protocol again. Add TCP/IP protocol in w >:>