18 Questions
What is the primary goal of the OSI model?
To provide a framework for building networks
What type of transmission uses a single channel to transmit multiple signals?
Multiplexing
What is the main purpose of error detection in data communication?
To detect and correct errors
What is the difference between analog and digital data transmission?
Analog is continuous, digital is discrete
What is the main advantage of packet-switching over circuit-switching?
More efficient use of network resources
What is the primary function of the data link control layer?
Flow control and error detection
What is the primary focus of the course CSE 231?
Computer Networks
What topic is covered in the 'Switching techniques' section of the syllabus?
Network Communication
What is the topic of the 'Data link control' section of the syllabus?
Error detection and correction
What is the main theme of the 'Multiplexing' section of the syllabus?
Resource sharing
What is the primary focus of the 'Data Transmission' section of the syllabus?
Sending data between devices
What is the topic of the first lecture of the course CSE 231?
Introduction to Computer Networks
What is the primary purpose of HTTP?
To transfer data over the internet
What is the full form of Wi-Fi?
IEEE 802.11
What is the primary function of TCP?
To control the transmission of data
What is the full form of ISP?
Internet Service Provider
What is the primary function of IP?
To transfer data over the internet
What is the full form of IoT?
Internet Of Things
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
Test your knowledge of computer networks, data communication, transmission media, and network models. Covers OSI layers, transmission modes, and networking topologies.
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