Computer Networks and Data Communication

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Questions and Answers

What is the primary goal of the OSI model?

To simplify network architecture

To provide a framework for building networks (correct)

To enable secure data transmission

To facilitate communication between different devices

What type of transmission uses a single channel to transmit multiple signals?

Multiplexing (correct)

Modulation

Singleplexing

Switching

What is the main purpose of error detection in data communication?

To reduce network congestion

To improve data transmission speed

To prevent data loss

To detect and correct errors (correct)

What is the difference between analog and digital data transmission?

Analog is continuous, digital is discrete Signup and view all the answers

What is the main advantage of packet-switching over circuit-switching?

More efficient use of network resources Signup and view all the answers

What is the primary function of the data link control layer?

Flow control and error detection Signup and view all the answers

What is the primary focus of the course CSE 231?

Computer Networks Signup and view all the answers

What topic is covered in the 'Switching techniques' section of the syllabus?

Network Communication Signup and view all the answers

What is the topic of the 'Data link control' section of the syllabus?

Error detection and correction Signup and view all the answers

What is the main theme of the 'Multiplexing' section of the syllabus?

Resource sharing Signup and view all the answers

What is the primary focus of the 'Data Transmission' section of the syllabus?

Sending data between devices Signup and view all the answers

What is the topic of the first lecture of the course CSE 231?

Introduction to Computer Networks Signup and view all the answers

What is the primary purpose of HTTP?

To transfer data over the internet Signup and view all the answers

What is the full form of Wi-Fi?

IEEE 802.11 Signup and view all the answers

What is the primary function of TCP?

To control the transmission of data Signup and view all the answers

What is the full form of ISP?

Internet Service Provider Signup and view all the answers

What is the primary function of IP?

To transfer data over the internet Signup and view all the answers

What is the full form of IoT?

Internet Of Things Signup and view all the answers

Study Notes

Introduction to Computer Networks

Computer networks are a crucial part of modern communication, enabling data exchange between devices
Objectives of computer networks include communication, resource sharing, and information sharing

Data Communication

Data communication refers to the exchange of data between devices
Components of data communication include:
- Sender
- Receiver
- Message
- Medium
Data communication models include:
- Simplex
- Half-duplex
- Full-duplex
Transmission media include:
- Guided media (twisted pair, coaxial cable, fiber optic cable)
- Unguided media (wireless, satellite)

Network Criteria

Network criteria include:
- Performance
- Reliability
- Security
- Scalability
- Quality of Service (QoS)

Network Models

The Open System Interconnection (OSI) model is a 7-layer framework for network communication
OSI layers include:
- Physical (layer 1)
- Data link (layer 2)
- Network (layer 3)
- Transport (layer 4)
- Session (layer 5)
- Presentation (layer 6)
- Application (layer 7)

Data Transmission

Data transmission concepts include:
- Analog and digital data transmission
- Data transmission impairments (attenuation, distortion, noise)

Data Encoding

Data encoding techniques include:
- Digital data-digital signal
- Analog data-digital signal
- Digital data-analog signal
- Analog data-analog signal
Signaling, encoding, and modulation are essential in data transmission

Data Communications Interface

Data communications interface includes:
- Asynchronous and synchronous transmission
- Line configuration
- Transmission modes and interfacing

Data Link Control

Data link control includes:
- Flow control
- Error control
- Error detection
- Error correction
- Forward error correction
High-Level Data Link Control (HDLC) is a protocol used for data link control

Multiplexing and Switching

Multiplexing techniques include:
- Frequency Division Multiplexing (FDM)
- Time Division Multiplexing (TDM)
Switching techniques include:
- Circuit-switching
- Packet-switching

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Description

Test your knowledge of computer networks, data communication, transmission media, and network models. Covers OSI layers, transmission modes, and networking topologies.