With the development and popularization of modern computer and network technology, network analyzers have become an indispensable tool in network management and maintenance. A network analyzer refers to a class of software or hardware tools used to monitor, analyze, diagnose, and optimize network performance. Today's network analyzers have many powerful functions and can view and analyze various information in the network. The following are some common ones:
1. Network topology: The network analyzer can scan the network to obtain information about all devices in the network, including computers, routers, switches, etc., and can generate network topology diagrams to help administrators clearly understand the network topology and better understand the network topology. Carry out management and maintenance.
2. Packet (data frame) analysis: A network analyzer can intercept data packets in the network and display their contents. Network packets are the basic unit of network communication and contain a lot of information, including source and destination IP addresses, port numbers, protocol types, data length, etc. By analyzing data packets, administrators can understand network communication traffic, communication protocols, communication quality and other information.
3. Network performance diagnosis: The network analyzer can detect problems in the network and locate the problem by monitoring network traffic, delay and other parameters. For example, if the network delay is high, the administrator can use a network analyzer to find the cause of the delay, such as network congestion, network bottlenecks, etc.
4. Network security detection: Network analyzers can monitor network communications and detect network security issues such as malicious attacks and virus infections. For example, through packet capture and analysis, administrators can discover intrusions, ARP spoofing and other attacks in the network.
5. Device management: Network analyzer can manage network devices. For example, for devices such as routers and switches, the network analyzer can configure, upgrade firmware and other operations to achieve remote management.
6. Network traffic control: Network analyzer can manage and control network traffic. For example, you can set policies for gateways, routers, and other devices to limit network traffic and prevent network congestion.
7. Application analysis: Some network analyzers can analyze application layer data, such as email, web pages, chat and other applications. They can view application layer protocols, analyze data transmission, and understand application usage and performance bottlenecks.
In short, the network analyzer can help administrators view and diagnose various network information from all aspects, thereby achieving more accurate and efficient network management and maintenance, and ensuring network stability and security.
