Networking hardware

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Networksa group or system of interconnected people or things.[1]

Networking hardware

Networka group or system of interconnected people or things. hardware Description
Router a networking device that forwards data packets between computer networksa group or system of interconnected people or things.. Routers perform the "traffic directing" functions on the Internet. A data packet is typically forwarded from one router to another through the networksa group or system of interconnected people or things. that constitute the internetwork until it reaches its destination node. It works on OSI layer 3.
Gateway an interface providing a compatibilityA state in which two things are able to exist or occur together without problems or conflict. between networksa group or system of interconnected people or things. by converting transmission speeds, protocols, codes, or security measures.
Switch a device that connects devices together on a computer networka group or system of interconnected people or things., by using packet switching to receive, process and forward data to the destination device. Unlike less advanced networka group or system of interconnected people or things. hubs, a networka group or system of interconnected people or things. switch forwards data only to one or multiple devices that need to receive it, rather than broadcasting the same data out of each of its ports. It works on OSI layer 2.
Bridge a device that connects multiple networka group or system of interconnected people or things. segments. It works on OSI layers 1 and 2.
Repeater an electronic device that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances.
Repeater hub for connecting multiple Ethernet devices together and making them act as a single networka group or system of interconnected people or things. segment. It has multiple input/output (I/O) ports, in which a signal introduced at the input of any port appears at the output of every port except the original incoming. A hub works at the physical layer (layer 1) of the OSI model. Repeater hubs also participate in collision detection, forwarding a jam signal to all ports if it detects a collision. Hubs are now largely obsolete, having been replaced by networka group or system of interconnected people or things. switches except in very old installations or specialized applications.
Firewall a piece of hardware or software put on the networka group or system of interconnected people or things. to prevent some communications forbidden by the networka group or system of interconnected people or things. policy.[12] A firewall typically establishes a barrier between a trusted, secure internal networka group or system of interconnected people or things. and another outside networka group or system of interconnected people or things., such as the Internet, that is assumed to not be secure or trusted.

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Students can get confused between a router and a switch. click here to read an excellent description.

References