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What is the working principle of KVM switch? I believe many inexperienced people don't know what to do about it. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

How the KVM switch works

Electronic components knowledge, January 6, computer switch, also known as KVM switch, or multi-computer switch, generally referred to as KVM,KVM for English keyboard (Keyboard), monitor (Video) and mouse (Mouse) and other three acronyms. A computer switch is a computer peripheral hardware that allows system administrators to control multiple computers or servers through a set of keyboards, mice, and monitors. The core idea of computer switch technology is to realize the high manageability of the system and network through the proper configuration of keyboard, mouse and monitor, improve the work efficiency of managers and save the area of computer room. reduce the total cost of ownership of the network server system. At present, the application field of computer switch has expanded from controlling computer or server host to controlling serial port devices, such as hubs, routers, storage devices, UPS and so on. The sophisticated KVM (computer switch) solution features IP remote management, event logging, remote power management, multi-level user rights security management, environmental warning system, Cat5 cable and other functions, allowing multiple administrators to securely manage or access thousands of servers and network devices at any time, anywhere.

Computer switch (KVM) category:

By network environment: IP-based and non-IP-based (remote control and general applications)

By equipment environment: mechanical and electronic (manual and automatic)

According to the installation mode: desktop and rack computer switches can be classified according to different standards. For example, according to the working mode, it can be divided into analog computer switch and digital computer switch; according to the scope of application, it can be divided into high, middle and low three categories; according to the network environment, it can be divided into IP-based and non-IP-based.

1. Analog and digital analog computer switches are mainly early products, used in nearby computer rooms or local single cabinets, the price is also relatively low, for small and medium-sized enterprises with high performance-to-price ratio.

The digital computer switch is an analog upgrade, because the hosts we want to manage may be distributed everywhere, so the digital computer switch integrates IP network technology. As long as the network is open, network managers can manage servers anywhere, including hosts on the Internet.

two。 Application range classification from the scope of application, the low-end computer switch has fewer ports and can control only a few hosts, which is suitable for SOHU and some small networks. The general price is also relatively cheap, only a few hundred yuan.

Mid-range computer switches are widely used in small and medium-sized enterprise networks. They generally have 8-16 connection ports, which can better meet the needs of applications, and can switch freely between different operating system platforms.

The computer switch with more than 32 connection ports belongs to the high-end computer switch, and most of them manage the host based on the network IP address, with the characteristics of high density, high-end port number and multi-user operation at the same time, so it is generally used in large networks.

Characteristics of computer switch

Plug-and-play design makes it easy to operate.

Can support a variety of video computers and servers such as PC, SUN and MAC.

Suitable for NETWARE, WIN95/98/2000/ME/XP/NT, UNIX, OS/2 and other operating systems and application software.

It can be adapted to various resolution displays such as VGA, SVGA and XGA.

It has powerful functions such as automatic scanning, hotkey switching and OSD menu.

Application range of computer switch

Internet data center information control center telecommunications paging system securities / futures trading system bank data center industrial control environment teaching environment test center video surveillance power plant monitoring computer room management other multi-host environment

What problems should be paid attention to when purchasing a computer switch?

With the advancement of social networking process, KVM plays a more and more irreplaceable role in enterprise network management. Many network managers need to buy KVM products to better manage servers and improve work efficiency. There are many kinds of KVM on the market, such as KVM switch, LCD KVM, IP KVM,CAT5 KVM,USB KVM,PS/2 KVM, and so on.

So what problems should be paid attention to in the process of KVM procurement?

1. Compatibility is a factor that will be considered in all software and hardware purchases. But this is even more important for the KVM switch. If a KVM monitor cannot output the required video signal and the keyboard and mouse cannot be controlled, what is the use value of such KVM? the compatibility of KVM is mainly considered in two aspects: first, it should be compatible with different operating systems, including Windows, Unix, Linux, etc., and secondly, it should be compatible with different keyboards, mice and monitors. For keyboard and mouse, we need to consider the compatibility of different interfaces such as PS/2 and USB.

two。 Easy to use the operation mode of KVM introduced by different manufacturers is different. Therefore, it needs to be properly considered when choosing and purchasing, for example, some KVM switches with keyboard hotkeys, others switch through OSD menus. When switching, you also need to check the comfort of the button, whether the switch is sensitive, whether the button is flexible; in addition, ease of use is also shown in whether to support hot plugging, because it is common to add or decrease some equipment in the process of maintenance.

3. Low-end KVM switches in signal attenuation are directly connected by cables, so the quality of cables directly affects the transmission of signals, especially in long-distance transmission, the requirements of cables are more stringent. The image quality of the output of bad KVM products is not good, and there is a delay in control.

4. The scalability of scalable KVM switches is also important, because with the development of the network, more and more servers need to be maintained. if existing KVM products do not support cascading, it means that they need to be repurchased, which will add a lot of costs. The switches that support cascading only need to be upgraded and expanded according to the increased number of servers to meet daily needs.

After reading the above, have you mastered how the KVM switch works? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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