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Computer Networks Quiz 33 (10 MCQs)

This set of multiple-choice questions evaluates understanding of Ethernet connections, twisted pair cables, RJ-45 connectors, and network protocols such as TelNet and WAP. It covers concepts like data transmission, real-time communication, and mobile internet access, assessing knowledge of computer networking fundamentals and global infrastructure.

Quiz Instructions

Select an option to see the correct answer instantly.

1. A collection of interconnected computers is called a .....

Correct Answer: Correct answer is: (C) Computer network.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: A collection of interconnected computers is known as a computer network. This network allows computers to communicate and share resources.

Common Mistakes: A common misunderstanding is that "telecommunication" or "broadband network" refers to a collection of interconnected computers, but these terms are broader and can include other forms of communication technology.

Explanations: A computer network is a set of interconnected computers that can communicate with each other and share resources. This definition directly matches the description given in the question. Telecommunication and broadband networks are broader terms that encompass various forms of communication, not just computers. ARPANET, while historically significant, is a specific type of early computer network, not a general term for interconnected computers.

Option Analysis:

Option A: Telecommunication refers to the transmission of information over a distance, which includes various forms of communication technology, not just computers.
Option B: Broadband network is a type of telecommunication network that provides high-speed data transmission, but it is not specific to interconnected computers.
Option C: Computer network is the correct term for a collection of interconnected computers that can communicate and share resources.
Option D: ARPANET is a specific early computer network, not a general term for interconnected computers.

2. What is the role of chat in wireless computer networks?

Correct Answer: Correct answer is: (C) The role of chat in wireless computer networks is to enable real-time communication between users.

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

Difficulty: Moderate

Concept notes: Chat applications in wireless computer networks facilitate instant messaging and real-time communication between users.

Common Mistakes: A common misunderstanding is that chat applications are primarily used for traffic control or weather updates, which are unrelated to their core function.

Explanations: Chat applications in wireless computer networks are designed to enable real-time communication between users. This means that messages are sent and received almost instantaneously, allowing for immediate interaction and conversation. This real-time communication is a key feature of chat applications and is essential for their functionality in wireless networks.

Option Analysis:

Option A: Chat does not control traffic signals in wireless networks. Traffic control is managed by network protocols and hardware, not chat applications.
Option B: Chat applications are not designed to provide weather updates. This is a function typically handled by dedicated weather services or applications.
Option C: Chat applications enable real-time communication between users, which is their primary function in wireless networks.
Option D: Chat applications do not manage inventory for businesses. Inventory management is handled by specialized software and systems.

3. The protocol used to control a remote computer is

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: TelNet is used for remote login and control of a computer.

Common Mistakes: FTP is often confused with TelNet as both are used for remote operations, but FTP is specifically for file transfer.

Explanations: TelNet allows a user to connect to a remote computer and control it as if they were directly using the remote machine. This makes it the appropriate protocol for remote computer control.

Option Analysis:

Option A: Correct, TelNet is used for remote login and control.
Option B: Incorrect, FTP is used for file transfer, not remote control.
Option C: Incorrect, IP is the Internet Protocol for addressing and routing packets.
Option D: Incorrect, HTTP is used for web browsing, not remote control.

4. At what point are the packets checked to see if they are all there?

Correct Answer: Correct answer is: (A) Before the package is reassembled at the destination.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: In computer networks, packets are checked for completeness before reassembly at the destination to ensure that all parts of the data are present and correct.

Common Mistakes: A common misunderstanding is that packet verification occurs during or after reassembly, but this is incorrect. Verification must happen before reassembly to prevent incomplete data from being processed.

Explanations: In a network, packets are transmitted from the source to the destination. Before the destination reassembles the packets into the original data, it checks to ensure all packets are present. This verification step is crucial to prevent incomplete data from being processed, ensuring data integrity.

Option Analysis:

Option A: Correct. Packets are checked for completeness before reassembly at the destination.
Option B: Incorrect. Checking packets during reassembly would not prevent incomplete data from being processed.
Option C: Incorrect. Checking after reassembly would be too late to prevent incomplete data from being processed.
Option D: Incorrect. Checking before the package leaves the origin does not ensure all packets reach the destination.

5. STP and UTP cables use these type of connectors

Correct Answer: Correct answer is: (A) RJ-45.

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

Difficulty: Easy

Concept notes: RJ-45 connectors are commonly used for connecting Ethernet cables, including both STP (Shielded Twisted Pair) and UTP (Unshielded Twisted Pair) cables.

Common Mistakes: A common misunderstanding is that different types of cables require different types of connectors. However, both STP and UTP cables use the same RJ-45 connector.

Explanations: RJ-45 connectors are designed to support Ethernet connections and are compatible with both STP and UTP cables. These connectors have eight pins and are used to establish a wired network connection. The RJ-45 connector is the standard for Ethernet cables, ensuring compatibility across different types of twisted pair cables.

Option Analysis:

Option A: Correct. RJ-45 connectors are used for both STP and UTP cables.
Option B: Incorrect. RJ-11 connectors are typically used for telephone lines, not Ethernet cables.
Option C: Incorrect. RJ-48C connectors are used for T1 connections, not for Ethernet cables.
Option D: Incorrect. RS-232 is a standard for serial communication and does not use RJ connectors.

6. Which one of the following enables the mobile devices to access internet resources?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: WAP (Wireless Application Protocol) is a set of communication protocols that enables mobile devices to access internet resources.

Common Mistakes: A common misunderstanding is that HTTP or TCP alone are sufficient for mobile devices to access the internet. However, WAP is specifically designed for mobile devices to efficiently access internet resources.

Explanations: WAP is a protocol suite designed to enable mobile devices to access internet resources efficiently. It includes a set of protocols that optimize data transmission for mobile networks, making it suitable for devices with limited bandwidth and processing power. While HTTP and TCP are also used in mobile networks, WAP provides additional features tailored for mobile devices, such as WML (Wireless Markup Language) for simplified web content.

Option Analysis:

Option A: WAP is the correct answer as it is specifically designed for mobile devices to access internet resources.
Option B: ISP (Internet Service Provider) provides internet access but does not specifically enable mobile devices to access internet resources.
Option C: HTTP (Hypertext Transfer Protocol) is used for transmitting web pages but is not specific to mobile devices.
Option D: TCP (Transmission Control Protocol) is a transport layer protocol but does not specifically enable mobile devices to access internet resources.

Mnemonic: WAP: Wireless Access Protocol

7. "A central backing store is available to all computers" is a feature of which usage model?

Correct Answer: Correct answer is: (A) Client server.

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

Difficulty: Moderate

Concept notes: In a client-server model, a central server provides resources and services to multiple client computers. The central backing store is a key feature of this model, as it allows all clients to access shared data and resources.

Common Mistakes: A common misunderstanding is that a central backing store is unique to client-server models. However, it can also be present in other models, but the client-server model specifically emphasizes this feature.

Explanations: In a client-server model, a central server acts as a hub for all client computers. This central server often includes a central backing store, which is a shared storage area that all clients can access. This feature allows for efficient data sharing and management, making it a defining characteristic of the client-server model.

Option Analysis:

Option A: Correct. The client-server model includes a central server with a central backing store that all clients can access.
Option B: Incorrect. In a peer-to-peer model, each computer acts as both a client and a server, and there is no central backing store.
Option C: Incorrect. A LAN (Local Area Network) is a type of network, not a specific usage model. While a LAN can use a client-server model, it is not defined by the presence of a central backing store.
Option D: Incorrect. A WAN (Wide Area Network) is also a type of network, not a specific usage model. Similar to a LAN, a WAN can use a client-server model, but it is not defined by the presence of a central backing store.

8. What is the fastest type of network connection?

Correct Answer: Correct answer is: (C) Fibre optics.

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

Difficulty: Easy

Concept notes: Fibre optics provide the fastest type of network connection due to their high bandwidth and low signal loss over long distances.

Common Mistakes: A common misunderstanding is that Wi-Fi or Ethernet might be the fastest due to their widespread use in homes and offices.

Explanations: Fibre optics use light to transmit data, which allows for extremely high data transfer rates and minimal signal degradation. This makes fibre optics the fastest type of network connection available.

Option Analysis:

Option A: Ethernet is fast but not as fast as fibre optics due to its use of electrical signals which can be subject to interference and signal loss over long distances.
Option B: Mobile data is generally slower than fibre optics due to the limitations of wireless communication and the shared nature of mobile networks.
Option C: Fibre optics use light to transmit data, providing the highest data transfer rates and minimal signal loss, making it the fastest network connection type.
Option D: Wi-Fi is convenient but not as fast as fibre optics due to its wireless nature and potential interference from other devices.

9. How do communicating parties operate in half-duplex communication?

Correct Answer: Correct answer is: (B) They take turns transmitting and receiving.

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

Difficulty: Moderate

Concept notes: In half-duplex communication, devices can both transmit and receive data, but not simultaneously. They must alternate between sending and receiving.

Common Mistakes: A common misunderstanding is that half-duplex communication allows simultaneous transmission and reception, which is incorrect. This is a characteristic of full-duplex communication.

Explanations: In half-duplex communication, devices must take turns to transmit and receive data. This means that when one device is transmitting, the other device must be in receive mode, and vice versa. This ensures that the communication channel is not overloaded and that data is transmitted and received accurately.

Option Analysis:

Option A: Incorrect, as half-duplex communication does not allow both parties to speak at the same time.
Option B: Correct, as half-duplex communication involves taking turns to transmit and receive data.
Option C: Incorrect, as half-duplex communication allows for responses, but not simultaneously.
Option D: Incorrect, as half-duplex communication does not involve storing data before sending; it involves alternating between transmit and receive modes.

10. True or False: Underwater wires connect networks across continents.

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

Exam Relevance: Network+ Certification, CCNA, CISSP

Difficulty: Easy

Concept notes: Underwater cables, also known as submarine cables, are used to connect networks across continents.

Common Mistakes: A common misunderstanding is that networks across continents are only connected via satellites, but submarine cables are a crucial part of global network infrastructure.

Explanations: Submarine cables are used to transmit data across oceans and connect different continents. These cables are laid on the ocean floor and provide high-speed, reliable communication links between different regions. Therefore, underwater wires do indeed connect networks across continents.

Option Analysis:

Option A: This option is correct because submarine cables are used to connect networks across continents.
Option B: This option is incorrect because it contradicts the established use of submarine cables in global network infrastructure.

Frequently Asked Questions

What is a computer network?

A computer network is a collection of interconnected computers and devices that can communicate and share resources, such as files, printers, and internet access.

How does data integrity ensure reliable communication in a network?

Data integrity ensures that data remains accurate and consistent during transmission by using techniques like checksums and error-correcting codes to detect and correct errors.

What is the client-server model in computer networks?

The client-server model is a network architecture where one or more client devices request services from a central server, which processes the requests and sends responses back to the clients.

What is the purpose of TelNet in network communication?

TelNet is a protocol used for remote login, allowing users to connect to a remote computer over a network and perform tasks as if they were directly using the remote system.

How do wireless networks differ from wired networks?

Wireless networks use radio waves or infrared signals to transmit data, while wired networks use physical cables like Ethernet or fiber optics. Wireless networks offer mobility but may have lower speeds and security concerns.

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