"The transfer and reception of data in the form of a digital bitstream or a digitized analog signal transmitted over a point-to-point or point-to-multipoint communication channel."
The technology and methods of transmitting data over a distance, including topics such as modulation, multiplexing, and protocols.
Introduction to Data Communications: Basic concepts, types of communication networks, and components of a communication system.
Network Topologies: Description of network topologies, their types, advantages, and disadvantages.
Networking Protocols: Description of different network protocols, including TCP/IP, OSI model, and their functions.
Transmission Media: Description of different media used for data transmission, including copper wires, optical fibers, microwaves, and satellite communication.
Modulation and Demodulation: Description of modulation and demodulation techniques used in data communications, such as amplitude modulation, phase modulation, and frequency modulation.
Multiplexing and Demultiplexing: Description of multiplexing and demultiplexing techniques, including time-division multiplexing and frequency-division multiplexing.
Circuit Switching and Packet Switching: Description of circuit switching and packet switching networks, their advantages, and disadvantages.
Error Detection and Correction: Description of different error detection and correction techniques, including parity checking, cyclic redundancy check, and error-correcting codes.
Network Security: Description of network security measures, including firewalls, VPNs, and encryption techniques.
Wireless Communication: Description of different wireless communication technologies, including Wi-Fi, Bluetooth, and cellular networks.
Internet and Data Communications: Description of the internet, its architecture, and its role in data communications.
Cloud Computing: Description of cloud computing, its advantages, and its applications in data communications.
Big Data: Description of big data, its characteristics, and its applications in data communications.
Network Design and Implementation: Description of network design principles, and techniques for implementing a network, including routing protocols and addressing.
Network Management: Description of fault management, configuration management, and performance management in a network.
Wired communication: Communication through cables or wires using electrical signals.
Wireless communication: Communication through airwaves or radio frequency signals.
Optical communication: Communication using light signals through fiber optic cables.
Microwave communication: Communication using high-frequency electromagnetic waves.
Satellite communication: Communication using artificial satellites orbiting the Earth.
Cellular communication: Communication using cellular networks and mobile devices.
Two-way radio communication: Communication using two-way radios, also known as walkie-talkies.
Packet communication: Communication using packet-switching technology to transmit data in discrete packets.
Voice communication: Communication using voice, such as telephone conversations or voice over IP (VoIP).
Video communication: Communication using video, such as video conferencing or streaming services.
Data storage and retrieval: Communication through storing and retrieving data, such as cloud storage or file transfer protocol (FTP).
Global positioning system (GPS) communication: Communication using the GPS network to transmit location data.
Telemetry communication: Communication through remote monitoring and control, such as industrial automation or medical monitoring.
Remote sensing communication: Communication through remote sensing technology, such as weather monitoring or surveillance.
Social media communication: Communication through social media platforms, such as Facebook, Twitter, or Instagram.
Email communication: Communication through email services, such as Gmail or Yahoo mail.
Instant messaging communication: Communication through instant messaging platforms, such as WhatsApp or Slack.
Internet of things (IoT) communication: Communication between devices connected via the internet, such as smart homes or wearables.
"Examples of such channels are copper wires, optical fibers, wireless communication using radio spectrum, storage media, and computer buses."
"The data is represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal."
"Analog transmission is a method of conveying voice, data, image, signal, or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable."
"The messages are either represented by a sequence of pulses by means of a line code (baseband transmission), or by a limited set of continuously varying waveforms (passband transmission)."
"The passband modulation and corresponding demodulation is carried out by modem equipment."
"According to the most common definition of digital signal, both baseband and passband signals representing bit-streams are considered as digital transmission."
"An alternative definition only considers the baseband signal as digital, and passband transmission of digital data as a form of digital-to-analog conversion."
"Data transmitted may be digital messages originating from a data source, for example, a computer or a keyboard."
"It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream, for example, using pulse-code modulation or more advanced source coding schemes."
"This source coding and decoding is carried out by codec equipment."
"Data communication or digital communications, including data transmission and data reception, is the transfer and reception of data in the form of a digital bitstream or a digitized analog signal transmitted over a point-to-point or point-to-multipoint communication channel."
"Examples of such channels are copper wires, optical fibers, wireless communication using radio spectrum, storage media, and computer buses."
"The data is represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal."
"Analog transmission is a method of conveying voice, data, image, signal, or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable."
"The messages are either represented by a sequence of pulses by means of a line code (baseband transmission), or by a limited set of continuously varying waveforms (passband transmission)."
"The passband modulation and corresponding demodulation is carried out by modem equipment."
"According to the most common definition of digital signal, both baseband and passband signals representing bit-streams are considered as digital transmission."
"An alternative definition only considers the baseband signal as digital, and passband transmission of digital data as a form of digital-to-analog conversion."
"Data transmitted may be digital messages originating from a data source, for example, a computer or a keyboard."