Ethernet switch


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Related to Ethernet switch: Ethernet hub

Ethernet switch

In the home or office, the Ethernet switch functions as a central station connecting computers, printers and every other wired device to each other. The switch is also wired to the router and modem to access the Internet. The wireless counterpart to Ethernet is Wi-Fi.

An Ethernet switch is one of the three major functions in a wireless router, and although stand-alone Ethernet switches have up to 48 ports, the Ethernet switch in the wireless router typically has only four ports. See Wi-Fi and wireless router.

Switches Can Be Chained
Switches can be wired to each other, each one splitting off to other devices. Additional switches become automatic Ethernet boosters, as every transmitted output gets power from the AC outlet the switch is plugged into.

Data or Data Plus Power
Regular Ethernet switches transmit data signals only; however, a powered version transmits electrical power to remote devices such as security cameras (see PoE).

10/100/1000 Switches (Gigabit Switches)
Gigabit switches support 10, 100 and 1,000 Mbps (1 Gbps). The Gigabit standard added full-duplex transmission, which provides simultaneous send and receive in each line. All Ethernet below 10,000 Mbps (10 Gbps) is backward compatible and detects the highest common speed between both ends of the connection. See 10 Gigabit Ethernet.

Unmanaged Vs. Managed
A basic "unmanaged" switch has no user configuration, and there is nothing to do except plug in the cables and turn it on. In contrast, for company networks, a "managed" switch can be configured to perform various tasks such as adjust speeds, combine users in subgroups, monitor traffic and report activity. See virtual LAN, SNMP, spanning tree protocol and Ethernet.


Hubs and Switches
The first Ethernet cross-connecting devices were "hubs" that share the total bandwidth. However, the switch treats each send-receive pair at full speed, and most all hubs have been replaced with switches.







Ethernet Switch
In the early 2000s, this unmanaged 16-port 10/100 switch from Omnitron was one of the first fanless and totally quiet Ethernet switches on the market.







In the Home Theater Rack
Switches plug into other switches. This Ethernet switch connects the TV, A/V receiver and streaming box to a 16-port Ethernet switch in another room.
References in periodicals archive ?
Total L2-3 L4-7 Unmanaged Ethernet Switch Shipments (Ports in Thousands)
Total L2-3 Managed Ethernet Switch Shipments (Ports in Thousands)
Total L2-3 Managed Ethernet Switch Manufacturer's Revenue (US$ in Millions)
L2-3 Fixed Managed Ethernet Switch Shipments (Ports in Thousands)
L2-3 Fixed Managed Ethernet Switch Manufacturer's Revenue (US$ in Millions)
L2-3 Modular Managed Ethernet Switch Shipments (Ports in Thousands)
The DuraNET 1059's galvanically isolated power supply and Ethernet switch components support operation from -40xC to +85xC, as well as tolerance to MIL-STD-810F shock and vibration profiles experienced by helicopter and fighter aircraft.
Initially, many customers were cautiously optimistic about our performance and latency claims based on the fact that no Ethernet switch chip vendor has ever come close to meeting the targets that we set out to achieve," said Bob Nunn, Fulcrum president and CEO.
Since first announcing the FocalPoint family in November, Fulcrum has received first silicon, brought up the chips and evaluation platforms in the lab, conducted extensive performance and conformance tests, and begun sampling the world's most powerful Ethernet switch chip in the world's most integrated Ethernet switch platform -- all within two months, and on schedule.
Given the strength in the small business segment, we anticipate that a 24- or 48-port Fast Ethernet fixed-configuration switch -- which can add features to securely handle applications such as VoIP and Wireless LAN without adding too much complexity or cost -- will be the product of choice for this market over the next couple of years," said Seamus Crehan, Director of Ethernet Switch Research for Dell'Oro Group.

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