The basics of data communication involve the transfer of data between devices through communication channels like cables or wireless signals. It covers the concepts of data encoding, transmission modes, and communication protocols.
This topic discusses various types of transmission media used to transmit data, such as guided media (fiber optics, coaxial cables) and unguided media (radio waves, microwaves).
Guided Transmission Media Guided transmission media refers to physical paths used to transmit data signals.
Unguided Transmission Media Unlike guided media, unguided transmission media does not use physical cables to transmit data.
Modulation is the process of converting digital data into analog signals for transmission, while demodulation is the reverse process. This topic covers different modulation techniques like AM, FM, and PM.
Cascading Style Sheets is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.
Data transmission can suffer from errors due to noise or interference. Error detection techniques like parity checks and CRC, and error correction methods like Hamming code, are essential for reliable communication.
This topic covers the devices used in data communication networks, including routers, switches, bridges, and modems, and explains their functions in facilitating communication between different network components.
Communication protocols, like TCP/IP and OSI model, define the rules for data exchange. This topic explains the different layers in network communication and how these protocols ensure proper data flow between devices