Anonymous
Anonymous asked in Computers & InternetComputer Networking · 1 decade ago

THE DIFFERENCE BETWEEN A ROUTER, SWITCH, GATEWAY, HUB AND A HUB?

Pls i will like a clear explanation of the following devices and there use and how they can be applied

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  • 1 decade ago
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    Router

    A device that determines where to send a data packet between at least two networks. Its decision is based on its current understanding of the networks. A router maintains a table of the available routes and their conditions. It uses this table together with distance and cost algorithms to determine the best route for a given data packet. Data packets often travel through a number of networks and routers before arriving at their destination.

    Switch

    A device that directs data packets along a path. It may include the function of a router. In general, a switch is a simpler and faster mechanism than a router as it does not maintain knowledge of the networks. A switch is not always required in a network. Many LANs are organised so that the nodes inspect each data packet.

    Hub

    A hub is a central connecting device in a network. Data arrives at the hub from one or more devices and is forwarded out using just one cable. For example, four cables from three computers and a printer are connected to a hub and then a single cable connects the hub to a server. A hub can also include a router. Most hubs were originally passive. The data simply passed through the hub without any change.

    Gateway

    A combination of hardware and software to link two different types of networks. This usually involves converting different protocols. For example, a gateway could be used to convert a TCP/IP packet to a NetWare IPX packet.

    Bridge

    A combination of hardware and software to link two similar networks. It often connects LANs that use the same protocol, such as Ethernet. A bridge examines each data packet on a LAN and forwards any data packets addressed to a connected LAN. Bridges are faster than routers because they connect networks that are using the same protocol.

    Source(s): Heinemann (Information Processes and Technology)
  • Anonymous
    4 years ago

    Hub Versus Switch

  • 5 years ago

    What's the difference between a Hub, a Switch and a Router? In a word: intelligence. Hubs, switches, and routers are all devices which let you connect one or more computers to other computers, networked devices, or to other networks. Each has two or more connectors called ports into which you plug in the cables to make the connection. Varying degrees of magic happen inside the device, and therein lies the difference. I often see the terms misused so let's clarify what each one really means. • A hub is typically the least expensive, least intelligent, and least complicated of the three. Its job is very simple: anything that comes in one port is sent out to the others. That's it. Every computer connected to the hub "sees" everything that every other computer on the hub sees. The hub itself is blissfully ignorant of the data being transmitted. For years, simple hubs have been quick and easy ways to connect computers in small networks. A switch does essentially what a hub does but more efficiently. By paying attention to the traffic that comes across it, it can "learn" where particular addresses are. For example, if it sees traffic from machine A coming in on port 2, it now knows that machine A is connected to that port and that traffic to machine A needs to only be sent to that port and not any of the others. The net result of using a switch over a hub is that most of the network traffic only goes where it needs to rather than to every port. On busy networks this can make the network significantly faster. A router is the smartest and most complicated of the bunch. Routers come in all shapes and sizes from the small four-port broadband routers that are very popular right now to the large industrial strength devices that drive the internet itself. A simple way to think of a router is as a computer that can be programmed to understand, possibly manipulate, and route the data its being asked to handle. For example, broadband routers include the ability to "hide" computers behind a type of firewall which involves slightly modifying the packets of network traffic as they traverse the device. All routers include some kind of user interface for configuring how the router will treat traffic. The really large routers include the equivalent of a full-blown programming language to describe how they should operate as well as the ability to communicate with other routers to describe or determine the best way to get network traffic from point A to point B.

  • Anonymous
    5 years ago

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    Hub and Switches are used over a Local Area Network (LAN). They interconnect different machines on the same LAN. The difference between them is that the hub "repeats" any message on the whole LAN, besides the switches tries to separate the LAN into several "collision domains" (each one on a single port of the switch), and sends the message only to the required machines. A router is used to interconnect LANs. A rooter between two LAN has two interfaces, one on each LAN. The router is used as a gateway when a machine from the LAN 1 wants to communicate with a machine on the LAN 2.

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  • Anonymous
    1 decade ago

    The explanation is lengthy, so read ithttp://www.asante.com/support/routerguide/faqs/har...

  • 7 years ago

    thnks..

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