Bridging (networking)

From Wikipedia, the free encyclopedia
  (Redirected from Network bridge)
Jump to: navigation, search
Network Bridging view using ISO/OSI layers and terminology

Network bridging describes the action taken by network equipment to allow two or more communication networks, or two or more network segments,[1] to create an aggregate network. Bridging is distinct from routing which allows the networks to communicate independently as separate networks.[2] A network bridge is a network device that connects multiple network segments. In the OSI model bridging acts in the first two layers, below the network layer.[3]

There are four types of network-bridging technologies: simple bridging; multiport bridging; learning, or transparent bridging; and source route bridging.[4][5] Transparent bridging was originally developed by the Digital Equipment Corporation (DEC) in the 1980s.[6]

See also[edit]


  1. ^ Traffic regulators: Network interfaces, hubs, switches, bridges, routers, and firewalls, Cisco Systems, 1999-09-14, retrieved 2012-07-27 
  2. ^ What is a Network Switch vs. a Router?, Cisco Systems, retrieved 2012-07-27 
  3. ^ "RFC 1286 - Definitions of Managed Objects for Bridges". 1989-07-14. Retrieved 2013-10-19. 
  4. ^ "Unknown" (PPT). Retrieved 2012-12-02. 
  5. ^ "Unknown" (PPT). Retrieved 2012-12-02. 
  6. ^ "Transparent Bridging". Cisco Systems. Retrieved 2010-06-20. 


  • Hamilton, Kenneth; Clark, Kenedy (1999-08-01). "Cisco LAN Switching". Encyclopedia of Things. Cisco Press. Retrieved 1999-08-01.