GCSE Computer Science: Data Transmission Technologies
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All Computer Science topics are covered, and each module comes complete with:
Activities & Quizzes
Mind Maps, Flashcards & Glossaries
Frequently Asked Questions
What is the difference between synchronous and asynchronous data transmission?
Synchronous data transmission involves sending data in a continuous stream with timing information to keep the sender and receiver synchronized, while asynchronous data transmission sends individual data packets with start and stop bits to indicate the beginning and end of each packet.
What is error detection and correction in data transmission?
Error detection and correction is the process of detecting and correcting errors that can occur during data transmission. This is often achieved through the use of error-correcting codes, which add redundant information to the transmitted data so that errors can be detected and corrected.
What is a protocol in data transmission?
A protocol is a set of rules and standards that govern the communication between two devices. In data transmission, protocols specify how data is transmitted, what type of data can be transmitted, and how the devices should respond to different types of messages.
What is multiplexing in data transmission?
Multiplexing is the process of combining multiple data streams into a single signal for transmission over a shared medium. This can be achieved through techniques such as time-division multiplexing (TDM), where each data stream is transmitted in a specific time slot, or frequency-division multiplexing (FDM), where each data stream is transmitted at a different frequency.
What is the difference between analog and digital data transmission?
Analog data transmission involves sending continuous signals that vary in amplitude, frequency, or phase to represent data, while digital data transmission involves converting data into discrete binary code (0s and 1s) for transmission. Digital data transmission is generally more reliable and efficient than analog transmission.