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Switching network technology
Feb 13, 2017

In 1993, local area network switching equipment appears, in 1994, started switching network technology boom. In fact, switching is a simplified, low price features, high performance and high port density switching products, reflect the complex switching technology of bridging technology the second layer in the OSI reference model. As with bridges, according to each package in the MAC address of the switch relatively simple information forwarded. The forwarding decision is not taken into account other information hidden deep in the Pack. Bridge different switch forward delay is small, operating close to a single local area network performance, far more than ordinary bridge between Internet forwarding performance.

Switching technology allows shared-and dedicated LAN segment bandwidth adjustment appears to ease the information flow between LAN bottlenecks. Now have Ethernet, fast Ethernet, FDDI and ATM technologies of switching products.

Similar to conventional bridges, the switch offers many networking features. Switch to economic conflicts to divide your network into smaller domains, providing higher bandwidth for each workstation. Protocol transparency makes the switch directly in software configuration easy to install multi protocol network; switches using existing cables, repeaters, hubs, workstations and network cards, avoid high level hardware upgrade; switch to workstation is a transparent, low management overhead, simplifies network node increasing, moves, and changes on the network's operations.

Specially designed integrated circuits can be used to make forwarding ports switches with line rate in all parallel information provides much higher than conventional bridges operating performance. In theory a single Ethernet port for packets containing 64 octets, 14880bps transfer rate. This means that a computer with 12 ports, support 6 channel parallel data flow "line rate" the overall throughput of Ethernet switches must be 89280bps (6 traffic information X14880bps/road). ASIC technology makes the exchanger in the case of more ports to these performance runs the port cost less than traditional bridges.