What is the function of the modem?
A modulator-demodulator, or simply a modem, is a hardware device that converts data from a digital format, intended for communication directly between devices with specialized wiring, into one suitable for a transmission medium such as telephone lines or radio.
What do modems use to communicate data?
To transmit digital data, the sending modem must first modulate, or encode, a computer’s digital signal into an analog signal that can travel over the phone line. A modem transmits data in bits per second (bps), with the fastest modems transmitting at 56K (kilobits per second).
Are modems communication devices?
One type of communications device that connects a communications channel to a sending or receiving device such as a com- puter is a modem. For communications channels that use digital signals (such as cable television lines), the modem transfers the digital signals between the computer and the communications channel.
How a modem facilitates communication between computers?
A MODEM is a MOdulation-DEModulation device that converts the discrete stream of digital “on-off” electric pulses used by computers into the analog wave patterns used for transmission of the human voice. Demodulator (recovers) the digital data from the transmitted signal.
What is the function of modem to connect to Internet?
Modem is short for “Modulator-Demodulator.” It is a hardware component that allows a computer or another device, such as a router or switch, to connect to the Internet. It converts or “modulates” an analog signal from a telephone or cable wire to digital data (1s and 0s) that a computer can recognize.
What is communication device and give at least 3 examples?
Similarly, a modem receives analog signals, and converts them to digital, for processing by the computer. This process is called modulation/demodulation, from which the modem gets its name. Other examples of communication devices include a NIC (network interface card), Wi-Fi devices, and access points.
What are the modern tools of communication?
Here are 10 modern communication tools to help you stay in connect with your audience:
- Social Media.
- Social Media – Direct Message (DM)
- Instant Message (IM)
- SMS Text Messaging.
- Email Marketing.
- Direct Email.
- Voice Calling.
What is the first modem?
Bell 103 modem
The first modem to be made commercially available in the United States was the Bell 103 modem, introduced in 1962 by the American Telephone & Telegraph Company (AT). The Bell 103 permitted full-duplex data transmission over conventional telephone circuits at data rates up to 300 bits per second.
What is the main function of a computer modem?
Modulated Signals. The essential function of a modem is to create an easily transmitted and decoded signal that allows digital data to be sent from place to place without the
How do you connect a modem to a computer?
Modems are the way that computers connect to the Internet. Locate the Ethernet and USB ports on the back of the modem. Locate the Ethernet port on your laptop. Attach the Ethernet cable between the laptop port and the modem port. Restart the modem by pulling the power plug out of the back and then reattaching it.
What are the disadvantages of a modem?
Risks With Modems. One potential disadvantage of having a modem connected to the internet is that it can leave you vulnerable to malware and hackers gaining access to your devices. For this reason, many routers and modems include built-in firewalls that restrict outside access to your network.
What is the role of the modem in computer networking?
Modems are used for data transfer from one computer network to another computer network through telephone lines. The computer network works in digital mode, while analog technology is used for carrying massages across phone lines.