Posted on October 24, 2014 by Richard Dominach
What is a KVM Switch?
KVM switches enable users to access and control multiple computer devices from a single keyboard, video and mouse (KVM) console. This includes servers, PCs, workstations and even tablet computers. Anyone requiring access to multiple computing devices over short or long distances can benefit from a KVM switch! This ranges from an engineer switching between multiple computers under his/her desk to an IT administrator maintaining thousands of servers across multiple sites.
Types of KVM Switches
There are several types of KVM switches, including (1) KVM extenders, (2) Analog KVM switches and (3) KVM-over-IP switches. A KVM extender provides point-to-point access between a single user and a single computer. Analog KVM Switches provide local access to multiple computers, at the desktop or up to 1000 feet away. KVM-over-IP Switches provide IP-based, BIOS-level remote access to computer devices over LAN, WAN and even the Internet. A related solution, the Serial Console Server, also known as a Terminal Server, provides IP access to serially managed devices such as network routers, switches and LINUX/UNIX servers.
KVM Switches over the Years
KVM switches have been around for over 20 years and have advanced from simple extender and analog-based solutions to the flexible, IP-based KVM solutions of today, which can provide centralized access to a few servers at a branch office or to tens of thousands of computers across multiple continents.
The KVM Switch Difference
Unlike software-based remote access solutions, KVM switches provide out-of-band and BIOS-level access. Out-of-band access means that the KVM switch is not dependent on the standard network connection of the remote computer. The KVM switch will provide access to the device even if the network is down or its operating system is not working. Since the KVM switch is directly connected to the computer via a cable or Computer Interface Module (CIM), BIOS-level access is available – locally with an analog switch or across the network with a KVM-over-IP switch. An important feature, available at the OS and BIOS levels, is virtual media. This allows a user to mount media such as CD/DVD/USB drive from their remote laptop or PC to a server in the lab or data center over their IP network. You can even boot an operating system remotely over IP from media on your PC or laptop!
Benefits of KVM Switches
By providing centralized access and control for multiple servers, PCs or workstations, KVM switches enable businesses of all sizes to realize the following benefits:
Learn More about Raritan’s KVM Solutions
Raritan has been a pioneer in the KVM industry, providing solutions to tens of thousands of customers for over 20 years. Check out the Why Raritan KVM page to understand the benefits and advantages of our KVM solutions.
Check out the many types of KVM solutions available on the KVM Switches listing page, including the Dominion KX suite of KVM-over-IP switches, the Paragon, MasterConsole and CompuSwitch analog KVM switches, and the CommandCenter centralized access and management system.
The Dominion SX Serial Console Servers can be found on the Serial Console Product page.
The Cat5 Reach KVM Extenders can be found on the Accessories Product Page.
KVM Product Selector
Raritan has many different models and options to meet a large variety of needs. With the KVM Product Selector, you can explore the various models, CIMs and accessories available.