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Last modified: Thursday, March 09, 2006 

(swich) (n.) (1) In networks, a device that filters and forwards packets between LAN segments. Switches operate at the data link layer (layer 2) and sometimes the network layer (layer 3) of the OSI Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs.

(2) A small lever or button. The switches on the back of printers and on expansion boards are called DIP switches. A switch that has just two positions is called a toggle switch.

(3) Another word for option or parameter -- a symbol that you add to a command to modify the command's behavior.

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AutomationDirect: Electrical Switches - Online seller of industrial electrical switches, pushbuttons and indicator lights. Products from Eaton Cutler-Hammer and others.

For pages about switch . Also check out the following links!

Related Links

Network Switching Tutorial 
How can you tell if your network will benefit from switching? And how do you add switches to your network design for the most benefit? This tutorial is written to answer these questions. provides easy-to-understand help for small-network builders. The site contains how-to information for setting up and debugging home-office and small-business networks. Users can also find extensive troubleshooting information, tips on getting applications to work through firewalls, product reviews on network hardware and software, and more. Discussion Forums 
If network connections, sharing computers, router problems or other networking issues are bogging you down, then the discussion forum is the place to be. Here you'll find help and support for all your network-related problems.

What's the Difference Between Routers, Switches and Hubs? 
Many people use the terms routers, switches and hubs interchangeably. However, the functions of the three devices are all quite different from one another, even if at times they are all integrated into a single device.

Switch Buyer's Directory
LAN Times site with information finding the right switches for your needs and budget. The directory features switches in nearly all categories: ATM, ethernet, Fast Ethernet, Gigabit Ethernet, FDDI, and token ring.

Sponsored listings

Digi-Key: E-Switch Switch - Broad-line distributor web site features real-time stock status and pricing, online ordering, RFQ, technical support, product datasheets and photos.

QVS: Computer Switch Boxes - Manufactures cables and connectivity products for the computer and communication industries. Parallel, SCSI, Mac, KVM, ethernet, and USB switches. Switch Boxes - Wholesale cable and PC products supplier offering switch boxes, including manual and monitor.

APM Hexseal: Electrical Switch Distributors - Develops and manufactures tough, pliable silicone rubber boots for toggle, pushbutton, rocker and rotary switches. Offers custom elastomeric molding. Industrial Switch Magnets - Provides database of suppliers for Industrial Switch Magnets. Browse catalogs and view technical information.

related categories

Business Computing


Networking Hardware

related terms




DIP switch



routing switch

switched Ethernet


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