network switch (also called switching hubbridging hub, officially MAC bridge) is a computer networking device that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device.

A network switch is a multiport network bridge that uses hardware addresses to process and forward data at the data link layer (layer 2) of the OSI model. Some switches can also process data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches.

Switches for Ethernet are the most common form of network switch. The first Ethernet switch was introduced by Kalpana in 1990. Switches also exist for other types of networks including Fibre Channel, Asynchronous Transfer Mode, and InfiniBand.

Unlike less advanced repeater hubs, which broadcast the same data out of each of its ports and let the devices decide what data they need, a network switch forwards data only to the devices that need to receive it.

Typically, this includes routers, switches, access points, network interface cards and other related hardware. This is a list of notable vendors who produce network hardware.

  • Aerohive Networks
  • Alaxala Networks
  • Nokia
  • Allied Telesis
  • Asus
  • Avaya – acquired Nortel, networking business sold to Extreme Networks
  • AVM
  • Brocade – acquired Vyatta, purchased by Broadcom
  • Billion Electric
  • Buffalo Technology
  • Cisco Systems
  • Dell – acquired Force10
  • D-Link
  • Enterasys – acquired by Extreme Networks in 2013
  • Ericsson – acquired Redback
  • Extreme Networks
  • HPE – acquired 3Com
  • Huawei Routers
  • Juniper Networks
  • LANCOM Systems
  • Linksys – acquired by Belkin
  • Meraki – acquired by Cisco Systems
  • Mitsubishi
  • NEC
  • Netgear
  • Nokia Networks
  • Open Mesh – acquired by Datto
  • RAD Data Communications
  • Ruckus – acquired by Brocade; to be acquired by ARRIS
  • Sierra Wireless
  • Telco Systems
  • TP-Link
  • Ubiquiti
  • Xirrus
  • Yamaha
  • ZyXEL
  • ZTE