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Computer Networks Quiz 18 (10 MCQs)

This set of multiple-choice questions evaluates understanding of data transmission types, communication channels, and network fundamentals. Topics include Ethernet cable types (CAT5, CAT6), LAN protocols (CSMA/CD, TCP/IP model), wireless networks (WLAN, RFID technology), and network resilience (fault tolerance, system redundancy). The questions assess knowledge of network layers, identification systems, and virtual organizations.

Quiz Instructions

Select an option to see the correct answer instantly.

1. RFID uses ..... to identify people or objects. Eg. RFID tag on a book contains a serial number which identifies the book.

Correct Answer: Correct answer is: (B) Radio waves.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: RFID (Radio-Frequency Identification) uses radio waves to identify objects or people. RFID tags emit radio waves that are detected by a reader, which then identifies the object or person based on the unique serial number stored in the tag.

Common Mistakes: A common misunderstanding is that RFID uses magnetic ink or infrared signals, which are used in other identification technologies but not in RFID.

Explanations: RFID technology relies on radio waves to transmit data between the RFID tag and the reader. The RFID tag contains a unique serial number that is transmitted via radio waves when the tag is within range of the reader. This allows for the identification and tracking of objects or people.

Option Analysis:

Option A: Magnetic ink is used in technologies like magnetic stripe cards, not RFID.
Option B: Radio waves are the correct medium used by RFID to transmit data.
Option C: Infrared signals are used in technologies like remote controls, not RFID.
Option D: Microwaves are used in technologies like microwave ovens, not RFID.

2. What does the term "fault tolerant" refer to in a network system?

Correct Answer: Correct answer is: (B) A system designed to keep working even if part of it fails.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: In computer networks, fault tolerance refers to the ability of a system to continue operating properly in the event of the failure of some of its components.

Common Mistakes: A common misunderstanding is that fault tolerance means the system never fails, but it actually means the system can continue to function despite some failures.

Explanations: A fault-tolerant system in computer networks is designed to maintain functionality even when some components fail. This is achieved through redundancy, error detection, and recovery mechanisms. The system can continue to operate and provide services even if some parts are not functioning correctly.

Option Analysis:

Option A: This is incorrect because a fault-tolerant system does not stop working if part of it fails. Instead, it continues to operate.
Option B: This is correct because a fault-tolerant system is designed to keep working even if part of it fails.
Option C: This is incorrect because fault tolerance does not imply constant maintenance. It refers to the system's ability to handle failures without requiring continuous maintenance.
Option D: This is incorrect because fault tolerance is not about compatibility with specific devices but about the system's resilience to component failures.

3. What are CAT5 and CAT6 common types of?

Correct Answer: Correct answer is: (A) Ethernet Cables.

Exam Relevance: CCNA, CompTIA Network+, CIW Network+

Difficulty: Easy

Concept notes: CAT5 and CAT6 are common types of Ethernet cables used in computer networks for data transmission.

Common Mistakes: A common misunderstanding is that CAT5 and CAT6 are types of protocols or software, rather than physical cables.

Explanations: CAT5 and CAT6 are standardized types of Ethernet cables designed for high-speed data transmission in computer networks. They are physical cables that connect devices such as computers, switches, and routers. CAT5 and CAT6 differ in their specifications and performance capabilities, with CAT6 offering higher bandwidth and reduced crosstalk compared to CAT5.

Option Analysis:

Option A: Correct. CAT5 and CAT6 are types of Ethernet cables.
Option B: Incorrect. Hackers are individuals who exploit computer systems, not types of cables.
Option C: Incorrect. Cats are animals, not types of cables.
Option D: Incorrect. Protocols are sets of rules for data communication, not types of cables.

4. Network is two or more computers connected via wire or wireless.

Correct Answer: Correct answer is: (A) True.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Very Easy

Concept notes: A network is defined as a system of interconnected computers or devices that can communicate with each other to share resources and information.

Common Mistakes: A common misunderstanding is that a network must be connected via wires. However, wireless connections are also valid forms of network connectivity.

Explanations: The statement is true because a network is fundamentally a system where two or more computers are connected, either through wired or wireless means, to facilitate communication and resource sharing.

Option Analysis:

Option A: This option is correct as it accurately reflects the definition of a network.
Option B: This option is incorrect because it contradicts the basic definition of a network.

5. Which one of the following is not a computer network?

Correct Answer: Correct answer is: (B) NAN.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: Computer networks are categorized based on their geographical coverage and size. Common types include LAN (Local Area Network), PAN (Personal Area Network), and WAN (Wide Area Network). NAN is not a standard term in computer networking.

Common Mistakes: A common mistake is assuming that all acronyms related to networks are valid types of computer networks. It is important to recognize the standard terms used in the field.

Explanations: LAN (Local Area Network) is a network that connects computers within a limited area such as a residence, school, or office building. PAN (Personal Area Network) is a network for interconnecting devices centered around an individual's workspace. WAN (Wide Area Network) is a network that covers a broad area, such as a city, country, or even the entire world. NAN is not a recognized term in computer networking, making it the correct answer.

Option Analysis:

Option A: LAN (Local Area Network) is a valid type of computer network.
Option B: NAN is not a recognized term in computer networking.
Option C: PAN (Personal Area Network) is a valid type of computer network.
Option D: WAN (Wide Area Network) is a valid type of computer network.

6. In simplex transmission

Correct Answer: Correct answer is: (B) Data transmission is one way.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Easy

Concept notes: Simplex transmission refers to a communication channel where data can only be transmitted in one direction.

Common Mistakes: A common misunderstanding is that simplex transmission implies a simple data format, but it specifically refers to the directionality of data transmission.

Explanations: Simplex transmission is characterized by the unidirectional flow of data. This means that data can only be sent from one end to the other, and not vice versa. This is why the correct answer is that data transmission is one way.

Option Analysis:

Option A: Data format is simple. This is incorrect because simplex transmission does not imply anything about the complexity of the data format.
Option B: Data transmission is one way. This is correct because simplex transmission is defined by the unidirectional flow of data.
Option C: Data can be transmitted to small distances only. This is incorrect because the distance of transmission is not a defining characteristic of simplex transmission.
Option D: None of the above. This is incorrect because option B is correct.

7. A system for connecting a number of computer systems to form a local area network, with protocols to control the passing of information and to avoid simultaneous transmission by two or more systems.

Correct Answer: Correct answer is: (D) Ethernet.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Moderate

Concept notes: Ethernet is a widely used technology for connecting devices in a local area network (LAN). It defines the protocols for data transmission and includes mechanisms to prevent collisions, ensuring that multiple devices do not transmit data simultaneously.

Common Mistakes: A common misunderstanding is that TCP (Transmission Control Protocol) is a LAN protocol, but TCP is a transport layer protocol used for reliable data transmission over the internet, not specifically for LANs.

Explanations: Ethernet is the correct answer because it is a protocol specifically designed for local area networks (LANs). It includes mechanisms such as Carrier Sense Multiple Access with Collision Detection (CSMA/CD) to manage data transmission and prevent simultaneous transmission by multiple devices. This ensures efficient and collision-free communication within the network.

Option Analysis:

Option A: TCP is a transport layer protocol used for reliable data transmission over the internet, not a LAN protocol.
Option B: Copper cable is a type of physical medium used for data transmission, not a protocol for managing network communication.
Option C: Fiber optic cable is another type of physical medium used for data transmission, not a protocol for managing network communication.
Option D: Ethernet is a protocol designed for LANs, including mechanisms to control data transmission and prevent collisions.

8. Which model has 4 layers?

Correct Answer: Correct answer is: (B) TCP/IP.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The TCP/IP model is a conceptual model that describes how data is transmitted over a network. It consists of four layers: Application, Transport, Internet, and Link.

Common Mistakes: A common mistake is confusing the TCP/IP model with the OSI model, which has seven layers.

Explanations: The TCP/IP model has four layers: Application, Transport, Internet, and Link. The Application layer includes protocols like HTTP, FTP, and SMTP. The Transport layer includes protocols like TCP and UDP. The Internet layer includes the IP protocol, and the Link layer deals with physical transmission over the network.

Option Analysis:

Option A: UCP/UP is not a standard network model and does not exist in the context of computer networks.
Option B: TCP/IP is the correct model with four layers: Application, Transport, Internet, and Link.
Option C: CS/IP is not a standard network model and does not exist in the context of computer networks.
Option D: UDP/IP is not a standard network model and does not exist in the context of computer networks.

9. Managing international performance in virtual organizations requires:

Correct Answer: Correct answer is: (C) Advanced technology for communication.

Exam Relevance: MBA exams, Project Management Professional (PMP), Certified Scrum Master (CSM)

Difficulty: Moderate

Concept notes: In virtual organizations, effective communication is crucial for managing international performance. Advanced technology for communication enables seamless interaction across different time zones and geographical locations.

Common Mistakes: A common misunderstanding is that face-to-face supervision or standardized performance metrics are the primary means of managing performance in virtual organizations. However, these methods are less effective without robust communication technology.

Explanations: Advanced technology for communication is essential in virtual organizations because it facilitates real-time collaboration, ensures consistent information sharing, and supports remote team management. This technology can include video conferencing, instant messaging, and project management tools, which are critical for maintaining productivity and performance across international teams.

Option Analysis:

Option A: Facetoface supervision is not practical in virtual organizations due to the geographical dispersion of team members.
Option B: Standardized performance metrics are important but do not address the communication challenges inherent in managing international teams.
Option C: Advanced technology for communication is crucial for effective management in virtual organizations, enabling seamless interaction and collaboration.
Option D: Uniform working hours are impractical in international teams due to different time zones and local work schedules.

10. This network is connected without cables.

Correct Answer: Correct answer is: (B) WLAN.

Exam Relevance: CCNA, CompTIA Network+, CIW Network Specialist

Difficulty: Easy

Concept notes: WLAN stands for Wireless Local Area Network, which is a type of network that allows devices to connect and communicate without the use of cables.

Common Mistakes: A common misunderstanding is that all wireless networks are WANs, but WLAN specifically refers to a local network that operates without cables.

Explanations: WLAN (Wireless Local Area Network) is the correct answer because it describes a network that operates without cables, allowing devices to connect and communicate wirelessly within a local area. This fits the description given in the question.

Option Analysis:

Option A: WAN (Wide Area Network) typically covers a larger geographical area and may or may not be wireless. It does not specifically describe a cable-free local network.
Option B: WLAN (Wireless Local Area Network) is the correct answer as it describes a network that operates without cables within a local area.
Option C: LAN (Local Area Network) can be either wired or wireless. While it is a local network, it does not specifically indicate a wireless connection.
Option D: None of the above is incorrect because WLAN is a valid and specific type of network that fits the description.

Frequently Asked Questions

What is a computer network?

A computer network is a collection of devices connected together to share resources and information. It allows for communication and data transfer between different devices over a communication channel.

What is the difference between a LAN and a WAN?

A LAN (Local Area Network) connects devices within a small area, such as a home or office, while a WAN (Wide Area Network) connects devices over a larger geographical area, such as different cities or countries.

What is the TCP/IP model?

The TCP/IP model is a conceptual framework used to design and understand the protocols used in the Internet and other networks. It consists of four layers that define how data is transmitted and received over a network.

What is the purpose of Ethernet cables?

Ethernet cables are used to connect devices in a wired network, providing a physical connection for data transmission. They are commonly used in LANs to ensure reliable and fast communication between devices.

What is a Wireless Local Area Network (WLAN)?

A Wireless Local Area Network (WLAN) is a type of network that uses radio waves to connect devices within a local area, such as a home or office, without the need for physical cables.

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