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Repeaters & Gateways

Gateways
Gateway is being used to connect different network. When a network has different protocol then gateway is used to connect that device with the network. This network device is more strengthen and intelligent then router.
Gateway pass the data according to receiver’s protocol after data is reached into the gateway. Gateway is more expensive than router. Gateway can be divided into some categories like protocol gateway, address gateway according to their type of work. A gateway is necessary when there are different technologies implemented by the different LAN’s which are to be connected together.
Advantages of a gateway
Network Repeaters
Some problems associated with the type of early network were solved with a device called a repeater. A repeater has the rather straightforward job of receiving big signal generating by NICs and other devices strengthening them and then sending them along or repeating them to other parts of the network. Repeater is like a microphone for network signals.
A repeater is a device similar to the Hub, but has additional features. It also works in the Physical layer. The repeaters are used in places where amplification of the input signal is necessary. But, the kind of amplification done by the repeater is different from the regular amplification by amplifiers. The regular amplifies everything fed into it. That means, if the input signal has noise induced into it, both the desired signal and noise signal are together amplified. But, in the case of a repeater, it regenerates the input signal, and amplifies only the desirable signal. Hence, the noise component of the signal is eliminated.

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