Data Communication and Networking — Chapter Summary
NIOS · Class 12 · Computer Science
Summary of Data Communication and Networking for NIOS Class 12 Computer Science. Part of the NIOS Class 12 Computer Science syllabus.
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Overview
Data communication is the process of transmitting digital information between two or more computers or devices. In today's connected world, networks are essential for sharing information, resources, and services across offices, homes, schools, and the entire globe. This chapter covers the fundamenta
Key Concepts
A data communication system consists
A data communication system consists of three basic elements working together. The transmitter converts information into suitable electrical or optica
There are three ways data can
There are three ways data can be transmitted between devices. Simplex transmission is one-way communication only—the receiver cannot send data back to
Analog transmission uses continuous signals
Analog transmission uses continuous signals that change smoothly over time, with infinite possible values. Examples include traditional telephone syst
The electromagnetic (E
The electromagnetic (E-M) spectrum represents all possible frequencies of electromagnetic radiation, ranging from extremely low frequencies (like radi
Bandwidth is the range of frequencies
Bandwidth is the range of frequencies that make up a signal, measured in hertz (Hz). In networking, bandwidth refers to the maximum data transmission
Learning Objectives
- Describe the basic elements of a data communication system and understand how they work together
- Explain transmission modes (simplex, half duplex, and full duplex) and identify when each is used
- Differentiate between analog and digital transmission and their applications
- Understand communication terminology including electromagnetic spectrum, bandwidth, and transfer rates
- Identify and explain various transmission media (both guided and unguided)
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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