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Data Communication
CBSE
Computer Science Class 12
Data Communication
Data Communication
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What is data communication?
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The transmission of data between devices.
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What is data communication?
The transmission of data between devices.
What are the three types of data communication?
Simplex, Half-Duplex, and Full-Duplex.
What is Simplex Communication?
Data flows in only one direction.
What is Half-Duplex Communication?
Data can flow in both directions, but not simultaneously.
What is Full-Duplex Communication?
Data can flow in both directions simultaneously.
What is Serial Transmission?
Data bits are sent sequentially over a single channel.
What is Parallel Transmission?
Multiple data bits are sent simultaneously over multiple channels.
What is Synchronous Transmission?
Data is sent in a continuous stream with a clock signal.
What is Asynchronous Transmission?
Data is sent in small packets with start and stop bits.
What is TCP/IP?
The fundamental protocol for the internet, providing reliable data delivery.
What is HTTP?
A protocol used for transmitting web pages.
What is HTTPS?
HTTP with an added layer of security through encryption.
What is FTP?
A protocol used for transferring files between computers.
What is SMTP?
A protocol used for sending emails.
What is POP3?
A protocol used for retrieving emails.
What is a Parity Check?
A method that adds a parity bit to make the number of 1s even or odd.
What is a Checksum?
A value calculated from data to ensure integrity during transmission.
What is Cyclic Redundancy Check (CRC)?
A method that treats data as a polynomial and checks for errors.
What is the formula for CRC?
$$ R(x) = D(x) \mod G(x) $$ where $D(x)$ is the data polynomial and $G(x)$ is the generator polynomial.
Why is error detection important?
To ensure data integrity during transmission.
What are the key components of data communication?
Types of communication, transmission modes, protocols, and error detection methods.
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