To maintain the performance of the local network, constant monitoring is required. This is an important stage of network management, which is often separated from the actual management and produced by autonomous means. Control consists of two parts - monitoring and analysis.
During monitoring, primary data is collected, which includes the number of frames and protocol packets, the status of switch ports, routers and hubs, etc. During the analysis, the collected information is comprehended, compared with previously obtained data, and assumptions are made about the reasons for the network to slow down or its failures.
What does a network administrator do ?
For monitoring, meters, hardware and software, network analyzers and testers, internal monitoring tools for communication devices, agents of control systems are used.
Analysis and monitoring tools have their own classification. With their help, an analysis is made of the functioning of the local computer network.
Management system agents that support the functionality of one of the standard MIBs (management database) use the SNMP or CMIP protocol to transmit information. Data from agents is collected in auto mode.
Installed systems for analysis and control include hardware and software modules of communication equipment and software modules of operating systems.
Protocol analyzers are used to monitor and analyze network traffic.
E kspertnye system designed for fault analysis and diagnosis of their causes. These can be simple context-sensitive systems or more complex intellectual knowledge bases.
Equipment for diagnostics and certification of cable systems includes network monitors for cable testing, cable scanners for copper cable systems, cable testers for breaks, certification devices for cable systems.
Protocol analyzers are computers with special network cards and software that comply with network technology. The analyzer is connected to the network as a workstation; it is distinguished by the reception of all data packets. The workstation receives packets addressed to it.
Network analyzers are used to measure the electrical characteristics of cable systems and cable certification. These are large appliances.
Cable scanners measure the electrical and mechanical parameters of cables - length, attenuation, impedance, wiring pairs of conductors, the level of electrical noise. They differ from network analyzers in a lower level of accuracy and portability.
Cable testers are used to diagnose cable breaks. They are simpler than cable scanners, but they detect the place of failure.
In addition, multifunctional portable devices with the functionality of cable scanners and protocol analyzers are used, which support some functions of control systems. The physical interface of these devices serves to identify problems and test cables at the physical level. A microprocessor with software performs the functions of a higher level.
The development of computer network technical maintenance regulations is carried out by specialists of the company's IT department or invited non-staff employees. The goals and objectives of the computer network maintenance system are to ensure the operability of the entire network and each of its elements, for which a condition is checked, detection and correction of possible malfunctions. Only a specialist with sufficient qualifications and the necessary level of professionalism can develop a system for maintaining a computer network.
The organization’s computer network is designed to implement the following production cycles: data storage in a centralized manner, document management, production of reports on completed work, accounting, work of other transaction systems, printing to a network printer, Internet access, organization of video and audio communication channels and much more.
Centralized network management software systems collect data on the status of communication equipment and network nodes, on its traffic, and also manage the network in automatic or semi-automatic mode. Management actions include changing settings, connecting and disconnecting ports, and more.
Programs for the network administrator, network utilities
To manage computer networks, special programs have been created that allow you to control all network devices from the administrator’s computer. Programs for system administrators such as VPN Client Manager, Winbox, Kerio VPN Client, TeamViewer, Radmin, RMS are intended for administration in the Windows environment .
Network modeling
Before creating a local network, it is necessary to simulate it, during which it is necessary to determine the optimal topology, select equipment, determine performance characteristics and protocols. On the model, you can test the effect of bursts of broadcast requests or test the collapse mode.
During the simulation, you can find out a lot of settings. Among them, peak throughput of network sections, response time of servers in different modes, the impact of installing new servers on the distribution of information flows, topology optimization for network bottlenecks, checking the operation of various network equipment, the maximum number of users, routing protocol, the impact of traffic on network operation .
During monitoring, primary data is collected, which includes the number of frames and protocol packets, the status of switch ports, routers and hubs, etc. During the analysis, the collected information is comprehended, compared with previously obtained data, and assumptions are made about the reasons for the network to slow down or its failures.
What does a network administrator do ?
For monitoring, meters, hardware and software, network analyzers and testers, internal monitoring tools for communication devices, agents of control systems are used.
Analysis and monitoring tools have their own classification. With their help, an analysis is made of the functioning of the local computer network.
Management system agents that support the functionality of one of the standard MIBs (management database) use the SNMP or CMIP protocol to transmit information. Data from agents is collected in auto mode.
Installed systems for analysis and control include hardware and software modules of communication equipment and software modules of operating systems.
Protocol analyzers are used to monitor and analyze network traffic.
E kspertnye system designed for fault analysis and diagnosis of their causes. These can be simple context-sensitive systems or more complex intellectual knowledge bases.
Equipment for diagnostics and certification of cable systems includes network monitors for cable testing, cable scanners for copper cable systems, cable testers for breaks, certification devices for cable systems.
Protocol analyzers are computers with special network cards and software that comply with network technology. The analyzer is connected to the network as a workstation; it is distinguished by the reception of all data packets. The workstation receives packets addressed to it.
Network analyzers are used to measure the electrical characteristics of cable systems and cable certification. These are large appliances.
Cable scanners measure the electrical and mechanical parameters of cables - length, attenuation, impedance, wiring pairs of conductors, the level of electrical noise. They differ from network analyzers in a lower level of accuracy and portability.
Cable testers are used to diagnose cable breaks. They are simpler than cable scanners, but they detect the place of failure.
In addition, multifunctional portable devices with the functionality of cable scanners and protocol analyzers are used, which support some functions of control systems. The physical interface of these devices serves to identify problems and test cables at the physical level. A microprocessor with software performs the functions of a higher level.
The development of computer network technical maintenance regulations is carried out by specialists of the company's IT department or invited non-staff employees. The goals and objectives of the computer network maintenance system are to ensure the operability of the entire network and each of its elements, for which a condition is checked, detection and correction of possible malfunctions. Only a specialist with sufficient qualifications and the necessary level of professionalism can develop a system for maintaining a computer network.
The organization’s computer network is designed to implement the following production cycles: data storage in a centralized manner, document management, production of reports on completed work, accounting, work of other transaction systems, printing to a network printer, Internet access, organization of video and audio communication channels and much more.
Centralized network management software systems collect data on the status of communication equipment and network nodes, on its traffic, and also manage the network in automatic or semi-automatic mode. Management actions include changing settings, connecting and disconnecting ports, and more.
Programs for the network administrator, network utilities
To manage computer networks, special programs have been created that allow you to control all network devices from the administrator’s computer. Programs for system administrators such as VPN Client Manager, Winbox, Kerio VPN Client, TeamViewer, Radmin, RMS are intended for administration in the Windows environment .
Network modeling
Before creating a local network, it is necessary to simulate it, during which it is necessary to determine the optimal topology, select equipment, determine performance characteristics and protocols. On the model, you can test the effect of bursts of broadcast requests or test the collapse mode.
During the simulation, you can find out a lot of settings. Among them, peak throughput of network sections, response time of servers in different modes, the impact of installing new servers on the distribution of information flows, topology optimization for network bottlenecks, checking the operation of various network equipment, the maximum number of users, routing protocol, the impact of traffic on network operation .
No comments:
Post a Comment