Bridging (networking)

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Network bridging view using ISO/OSI layers and terminology

Network bridging is the action taken by network equipment to create an aggregate network from either two or more communication networks, or two or more network segments.[1] Bridging is distinct from routing which allows the networks to communicate independently as separate networks.[2] Also, if one or more segments of the network are wireless, it is known as wireless bridging.

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]

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. 


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