Question

Q# 3. Modem is used to connect a
computer in a LAN Discuss.​

Answer 1

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Computer network consists of different devices such as router, hub, switch and others. Without these network devices data cannot be transmitted from one computer to another in a LAN or WAN network. These devices link up all the local and remote network segments with each other to make data communication from one segment to another. The two important devices of a big network are routers and switches. A computer network with good infrastructure with properly placed and configured network devices such as routers, switches etc. are helpful in reducing the overall operational cost, improve the performance, manageability and reliability.

A modem is communication device that performs two different functions such as modulation i.e., it converts the digital data into analog and analog into digital. The faster types of the modems are used by the internet such as DSL modem and optical modems.

Internal modem:

A modem that resides on an expansion board that plugs into a computer.

External modem:

An external modem is a box that attaches to a computer’s COM port via cables.

ADSL modem:

ADSL stands for Asymmetric Digital Subscriber Line. It is a technology that allows copper telephone pairs to be used to provide a broadband connection. It provides ‘always-on’ Internet connection that is automatically established once the PC and ADSL modem are switched on.

Always-on means that the ADL broadband sets up a permanent connection to the internet that lets you access the internet as soon as you switch on the computer and the modem. You do not need to dial up like when you are using a standard modem connection. There will be no call charges for internet access but voice calls will be charged as before.

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Answer 2

Answer:

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