Data Communication Quiz

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Questions and Answers

What is latency in data communication?

The speed at which data is processed.

The strength of the signal transmitted.

The time delay between data transmission and receipt. (correct)

The amount of data that can be transmitted simultaneously.

What is the impact of a high error rate in data transmission?

It strengthens the signal-to-noise ratio.

It leads to data corruption and loss. (correct)

It increases data transmission speed.

It improves data integrity.

How does a higher signal-to-noise ratio affect communication?

It makes communication slower.

It does not affect communication quality.

It ensures clearer and more reliable communication. (correct)

It results in increased interference.

What are internal factors related to in data communication?

The nature of the message itself. Signup and view all the answers

Which of the following is an external factor affecting data communication quality?

Network complexity. Signup and view all the answers

What is a characteristic of half-duplex communication?

Operates like a two-way street with bi-directional traffic Signup and view all the answers

Which of the following is an example of full-duplex communication?

Telephone communication Signup and view all the answers

How are numbers represented in data representation techniques?

By direct binary conversion Signup and view all the answers

What is the primary way that images are represented in data communications?

Using bit patterns in a pixel matrix Signup and view all the answers

What differentiates audio representation from other data types like text and images?

Audio is a constant representation of sound Signup and view all the answers

What does the Greek word 'tele' mean?

Far Signup and view all the answers

Which of the following is NOT a requirement for data communication?

Internet connection Signup and view all the answers

What is modulation in data communication?

Encoding digital data onto an analog signal Signup and view all the answers

Which application is NOT typically associated with data communication?

Biometric authentication Signup and view all the answers

Which process involves the sender encoding the data?

Encoding Signup and view all the answers

What types of data can be transmitted in data communication?

Text, voice, video, and digital data Signup and view all the answers

What does multiplexing involve in data communication?

Combining several data streams Signup and view all the answers

What type of channels can data communication occur over?

Wired and wireless channels Signup and view all the answers

What is the primary function of a switch in a network?

To forward data packets to intended recipients only Signup and view all the answers

At which layer of the OSI model do switches operate?

Data Link Layer (Layer 2) Signup and view all the answers

Which statement best describes a passive hub?

It relays signals without boosting or cleaning. Signup and view all the answers

Which is NOT a benefit of using switches in a network?

Increases overall network congestion Signup and view all the answers

What role does a switch play in local area networks (LANs)?

Directly connects devices enabling communication Signup and view all the answers

What is the primary function of a network interface card (NIC)?

To connect a computer to a network Signup and view all the answers

Which of the following is an example of a message-originating device?

Server Signup and view all the answers

What type of NIC supports wired connections and common speeds like 10 Mbps and 1 Gbps?

Ethernet NIC Signup and view all the answers

Which of the following describes a MAC address?

A unique 48-bit identifier in hexadecimal format Signup and view all the answers

What type of device is primarily responsible for directing and managing network traffic?

Switch Signup and view all the answers

Which Wi-Fi NIC standard corresponds to the fastest wireless connection?

802.11ac Signup and view all the answers

What is the purpose of software-configurable settings in a NIC?

To enable network communication with other devices Signup and view all the answers

Which of the following NIC types is used for Bluetooth network connections?

Bluetooth NIC Signup and view all the answers

What role does a gateway serve in a network?

Connects different network technologies Signup and view all the answers

At which OSI model layer does a router operate?

Layer 3 (Network Layer) Signup and view all the answers

What is a benefit of using routers in a network?

They segment networks for better security and manageability Signup and view all the answers

Which capability is NOT typically associated with routers?

Providing wireless internet access Signup and view all the answers

Which of the following best describes the primary function of routers?

To forward data packets between networks using IP addresses Signup and view all the answers

What is one of the main uses of gateways in networking?

To facilitate communication across different security policies Signup and view all the answers

What is a common application of routers in networking?

Connecting diverse networks in wide area networks (WANs) Signup and view all the answers

Which statement accurately describes the role of a router in a network?

Routers manage data flow and direct packets to their appropriate destinations Signup and view all the answers

Study Notes

Course Information

Course Title: Data Communication
Course Code: CSNS 241
Instructor: Dr. Felix L. Aryeh, CC
Qualifications: PhD, MSc, BSc, MISC², MIEEE, MIAENG, MIET-GH, MGARNET
Email: [email protected]

Course Presentation

Format: Weekly Lectures (face-to-face and online), Tutorials, Student-Led Presentations, and Take-Home Assignments

Course Objectives

Understand the scientific principles and concepts behind network systems design and organization.
Gain hands-on experience in designing and managing computer networks.
Learn about fundamental computer network types.
Study the merits and demerits of TCP/IP and OSI models.
Understand the role of networking protocols.

Recommended Textbooks & References

Ramon Nastase, "Computer Networking For Beginners"
Douglas Comer, "Computer Networks And Internets" (5th edition)
Russ White and Ethan banks, "Computer Networking Problems And Solutions: An Innovative Approach To Building Resilient, Modern Networks"
Michael B. White, "Computer Networking"
Olivier Bonaventure, "Computer Networking"

Course Information (CSNS 241)

Lecture Hours: 2
Continuous Assessment: 40%
- Attendance: 5-10%
- Quizzes (2 or 3, online) and pop quizzes
- Group Project/Assignment (1)
- Individual Presentation (practical, in person)
End of Semester: 50%

Lecture One: Data Communication and Networking Concepts

Student Learning Outcomes:
- Define data communication systems.
- Identify elements of a data communication system.
- Understand factors influencing data communication.
- Describe characteristics of network architectures (reliability, performance, and security)

Communication

Definition: Sharing information between individuals.
Types of Communication
- Local: Face-to-face interaction
- Remote: Facilitated by technology (e.g., telephony, telegraphy, television)
Data Communication: Exchange of data between devices over a transmission medium.

Requirements for Data Communication

Communicating devices as part of a communication system (hardware, software, protocols).

Key Techniques in Data Communication

Modulation: Encoding digital data onto an analog carrier signal.
Encoding: Converting digital data into specific codes.
Multiplexing: Combining multiple data streams into a single transmission channel.

Applications of Data Communication

Internet, telecommunications, computer networks, and wireless systems.

Data Communication (Definition)

Exchange of data/information between devices across a communication channel (wired or wireless).
Forms of Data Communication: text, voice, video, etc.

Data Communication Process

Encoding
Transmission
Decoding

Importance of Data Communication

Essential for internet, telecommunications networks, and computer networks.
Enables efficient and reliable information exchange.
Supports communication and collaboration.

Key Characteristics of an Effective Data Communication System

Delivery; Data must reach the correct destination.
Accuracy: Data must remain unaltered during transmission.
Timeliness: Data should be delivered promptly.
Jitter: Variation in packet arrival times; inconsistent delays in video packets result in poor video quality.

Factors Affecting Quality of Data Communication

Quality defined by accuracy, reliability, and efficiency.
Factors:
- Bandwidth: Amount of data transmitted over time.
- Latency: Time delay between data transmission and receipt.
- Error Rate: Frequency of errors during transmission; high error rates lead to data corruption and loss.
- Signal-to-Noise Ratio: Comparison of signal strength to background noise (higher ratios imply clearer communication).
- Interference: Disruption from other signals/devices, resulting in data loss/corruption.
Internal Factors (related to message): Message size, complexity, and importance.
External Factors (related to network): Pathway quality, number of concurrent messages, time allocated for successful communication.

Components of a Data Communication System

Definition: Complex system of hardware, software, protocols, and procedures for data transmission.
Key Components:
- Message (information).
- Sender (initiates the message).
- Receiver (receives the message).
- Transmission Medium (physical path).
- Protocol (set of data communication rules).

DataCom Protocol Functions

Data Sequencing, Routing, Formatting, Flow Control, Error Control.
Precedence, Connection, Termination, Security, and Log Information

Components of Data Communication System

Examples (Purpose/Sender/Receiver)

Data Flow in a Network

Definition: Data movement between devices.
Types of Data Flow:
- Simplex (one-way).
- Half-duplex (one direction at a time).
- Full-duplex (two-way simultaneously)

Data Representation Techniques

Representing data (text, numbers, images, audio, video) in bit patterns.

Network Components

Definition: Hardware and Software enabling communication and data transfer in a network.
Categories of Devices:
- Message-Originating: (computers, laptops, servers)
- Message-Directing/Managing: (routers, switches, repeaters)

Network Interface Cards (NICs)

Definition: Hardware connecting a computer to a network.
Types: Ethernet, Wi-Fi, Bluetooth.
MAC Address: Unique identifier for a NIC.
Configuration: Settings (IP address, subnet mask, default gateway).

Network Devices (Repeaters, Hubs, Switches, Bridges, Gateways, Routers)

Specific functions and benefits.

Lecture Questions

Questions about data/information differentiation, data representation, data communication characteristics, components of a data communication system, communication quality, influencing factors, network devices, NICs, and network components.

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Description

Test your knowledge on the principles of data communication and computer network systems. This quiz covers key concepts including network types, TCP/IP, and OSI models. Prepare to apply your understanding of networking protocols and their applications.

Data Communication Quiz - CSNS 241

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