modem, (from “modulator/demodulator”), any of a class of electronic devices that convert digital data signals into modulated analog signals suitable for transmission over analog telecommunications circuits.
What is network and how it works?
Computer networking refers to interconnected computing devices that can exchange data and share resources with each other. These networked devices use a system of rules, called communications protocols, to transmit information over physical or wireless technologies. Let’s answer some common computer networking FAQs.
How does data instructions and information travel?
Data, instructions, and information travel along a communications channel in either analog or digital form, depending on the com- munications channel. An analog signal consists of a continuous electrical wave. A digital signal consists of individual electrical pulses that represent bits grouped together into bytes.
What is network in data communication?
A computer network is a group of interconnected nodes or computing devices that exchange data and resources with each other. A network connection between these devices can be established using cable or wireless media.
What is a device that converts data so that it can be transmitted from computer to computer over a network Related Questions
What devices are used to transmit data?
These devices must be capable of sending and receiving data over a communication medium. Examples of such devices include personal computers, mobile phones, laptops, etc. As we can see in Figure 11.1, four different types of devices — computer, printer, server and switch are connected to form the network.
Which device generates the data to be transmitted?
Source: This device generates the data to be transmitted; examples are telephones and personal computers. Transmitter: the data generated by a source system are not transmitted directly in the form in which they were generated.
How does cellular network work?
Mobile phones work by sending and receiving low power radio signals, much like a 2 way radio system. The signals are sent to and received from antennas that are attached to radio transmitters and receivers, commonly referred to as mobile phone base stations.
How do network services work?
A network service is a capability that facilitates a network operation. It typically is provided by a server (which can be running one or more services), based on protocols running at the application layer in the Open Systems Interconnection (OSI) model of the network.
Which of the following manages how data packets are transmitted and delivered in a network?
TCP defines how applications can create channels of communication across a network. It also manages how a message is assembled into smaller packets before they are then transmitted over the internet and reassembled in the right order at the destination address.
How does data travel across a network?
The Internet works by chopping data into chunks called packets. Each packet then moves through the network in a series of hops. Each packet hops to a local Internet service provider (ISP), a company that offers access to the network – usually for a fee.
How does data transmission work between digital devices?
Data transmission is the transfer of data from one digital device to another. This transfer occurs via point-to-point data streams or channels. These channels may previously have been in the form of copper wires but are now much more likely to be part of a wireless network.
Is the transmission of messages and files via a computer network?
Data communications refers to the transmission of this digital data between two or more computers and a computer network or data network is a telecommunications network that allows computers to exchange data.
What are the three types of data networks?
LAN (Local Area Network) MAN (Metropolitan Area Network) WAN (Wide Area Network)
What are the 4 types of networks?
The four types of wireless networks — wireless LAN, wireless MAN, wireless PAN and wireless WAN — differ when it comes to size, range and connectivity requirements.
What is transmission mode?
Transmission mode refers to the mechanism of transferring of data between two. devices connected over a network. It is also called Communication Mode. These. modes direct the direction of flow of information.
What is an example of transmitting data?
Data transmission, digital transmission or digital communications is the transfer of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels include copper wires, optical fibers, wireless communication channels, storage media and computer buses.
Which device sends data from one network to another?
Router. A router directs data requests from one network to another. Routers examine incoming packets to determine the appropriate destination IP address and then forward the packet to that destination.
What is a device that can transmit and receive called?
In radio communication, a transceiver is an electronic device which is a combination of a radio transmitter and a receiver, hence the name. It can both transmit and receive radio waves using an antenna, for communication purposes.
How is cellular data transmitted?
Cellular phones work much the same way as do the other wireless devices we’ve been discussing. Signals carrying voice, text, and digital data are transmitted via radio waves from one device to another.
How is data transmitted to a cell phone?
Cell phones use radio waves to communicate. Radio waves transport digitized voice or data in the form of oscillating electric and magnetic fields, called the electromagnetic field (EMF). The rate of oscillation is called frequency. Radio waves carry the information and travel in air at the speed of light.