Questions and Answers
What is a computer network?
A collection of computers and devices interconnected by communications channels that facilitate communications and allows sharing of resources and information.
What does data communication refer to?
The transfer of data or information between a source and a receiver.
Which of the following are characteristics of effective data communication? (Select all that apply)
The three fundamental characteristics determining the effectiveness of a data communication system are delivery, accuracy, and _____ .
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What are the basic requirements for the working of a communication system?
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What is the definition of a protocol in data communication?
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What is feedback in the context of communication?
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Which codes are used to represent text in data communication? (Select all that apply)
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In data communications, numbers are converted to a _____ number for simplification.
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Study Notes
Computer Networks
- A computer network connects computers and devices via communication channels enabling resource and information sharing.
- Data communication involves transferring data between a source and a receiver, excluding the generation of information and its resultant actions.
Effectiveness of Data Communication
- Delivery: Data must reach the intended recipient without being misdelivered.
- Accuracy: Transmitted data must remain unaltered; errors in transmission must be corrected.
- Timeliness: Data should be delivered promptly; particularly important for real-time data like audio and video.
Components of Data Communication System
- Sender: Initiates the message to be transmitted.
- Medium: The means through which the message is transmitted; selection impacts message effectiveness.
- Receiver: The party receiving the message, influenced by their own ideas and feelings.
Key Elements of Communication
- Message: Represents communication content, context-dependent in meaning.
- Protocol: Formal rules for message format and exchange, covering signalling, authentication, error detection, and semantics.
- Feedback: Essential for confirming message interpretation and efficacy; can be verbal or non-verbal.
Data Representation
- Text: Represents symbols as sequences of bits, with various coding schemes like ASCII and EBCDIC.
- Numbers: Converted directly into binary for mathematical operations rather than using character coding.
- Images: Data representation of images involves specific coding to maintain the integrity and quality of visual information.
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Description
This quiz focuses on Unit-I of Data Communications in the CAP476 course at Lovely Professional University. It covers essential concepts related to data networking and the transfer of data, providing insights into how interconnected devices communicate effectively. Test your understanding of the foundational principles of computer networks.
