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If you are searching to learn about different types of communication devices with their applications, functions, and examples. Then you just need to read the following description. Let’s read it.
The hardware used to transmit data, instructions, and information between a sending and receiving device is called a communication device.
Some important communication devices are as follows:
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Modem stands for modulation and demodulation. A modem is a device that switches digital signals into analog and analog signals into digital. Modem forwards and accept data from one computer to another using telephone lines.
It is necessary that both the sending and receiving computer must hold modems.
The data is converted from digital to analog form because the modem transmits data using a telephone line. Demodulation is the process of converting the analog signal into a digital signal.
The receiving computer’s modem receives data in analog form. This analog data is then translated back into digital format to be used by the computer.
Some important features of modem are as follows:
Different types of dial-up modems are as follows:
External Modem: it is a stand-alone device that is attached to a serial port such as RS-232 on a computer with a telephone line.
Internal Modem: it is a card inserted into an expansion slot on the motherboard.
Wireless Modem: it is used to access the Web without wire from notebook and handheld computers, cellular phones, and other mobile devices.
The modem used with ISDN and DSL is called ISDN and DSL modems. A digital modem sends and receives data and information to and from digital telephone lines like ISDN and DSL.
Furthermore, the ISDN modem works with ISDN lines and the DSL modem works with DSL lines.
Cable Modem is also known as a broadband modem. The cable modem is a stand-alone device connected with a cable to a USB port. It sends and receives data over the cable television network. It provides faster internet speed than dial-up modem and ISDN.
Network Interface Card (NIC) is also called LAN adapter. It is used to connect a device to a network. It is also used for the management of instructions, the transmission of data, and information to and from the computer with NIC.
In addition, NIC works with particular network technology like Ethernet and token ring. The transfer rate of an Ethernet card is from 10 Mbps to 1000 Mbps. Different NICs are available for different types of computers.
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