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Computer Networks Quiz 43 (10 MCQs)

This set of multiple-choice questions evaluates understanding of ARPANET as the internet precursor, network fundamentals, and modern communication technologies. Concepts covered include the OSI model, Data Link Layer functions, MAC addresses, WIFI technology, and satellite navigation systems like GPS. The questions assess knowledge of network connectivity, resource sharing, and client-server models.

Quiz Instructions

Select an option to see the correct answer instantly.

1. What cable is used to connect PC to switch hub and router?

Correct Answer: Correct answer is: (B) Straight thru cable.

Exam Relevance: CCNA, CompTIA Network+, Network Fundamentals

Difficulty: Easy

Concept notes: Straight-through cables are used to connect devices of different types, such as a PC to a switch or router.

Common Mistakes: A common mistake is to confuse straight-through cables with crossover cables, which are used to connect devices of the same type, such as two switches or two PCs.

Explanations: Straight-through cables are designed to connect a PC to a switch or router. These cables have the same pin configuration on both ends, allowing for proper communication between the devices. In contrast, crossover cables have different pin configurations on each end, which is necessary for connecting devices of the same type.

Option Analysis:

Option A: UTP cable is a type of cable, but it does not specify the configuration needed for connecting a PC to a switch or router.
Option B: Straight-through cable is the correct choice for connecting a PC to a switch or router.
Option C: Crossover cable is used for connecting devices of the same type, not for connecting a PC to a switch or router.
Option D: Copper cable is a general term and does not specify the configuration needed for connecting a PC to a switch or router.

2. A system that accurately determines the precise position of something on Earth

Correct Answer: Correct answer is: (C) GPS.

Exam Relevance: GRE, GATE, COMPASS, CCNA

Difficulty: Moderate

Concept notes: GPS (Global Positioning System) is a satellite-based navigation system that provides location and time information anywhere on or near the Earth. It is widely used for determining precise positions.

Common Mistakes: A common misunderstanding is that other systems like STARS or DOC might be more accurate or widely used for precise positioning, but GPS is specifically designed for this purpose.

Explanations: GPS uses a network of satellites to provide precise location data. The system calculates the position of a receiver by measuring the time it takes for signals to travel from multiple satellites to the receiver. This method allows for highly accurate positioning, making GPS the most reliable and widely used system for determining precise positions on Earth.

Option Analysis:

Option A: STARS is not a system for determining precise positions; it refers to celestial bodies.
Option B: DOC is not a known system for determining precise positions; it could refer to various unrelated acronyms.
Option C: GPS is the correct answer as it is a satellite-based system designed to provide precise location data.
Option D: Sold is not a system for determining precise positions; it is a term related to transactions.

3. Which one of the following uses radio waves to provide wireless high-speed internet?

Correct Answer: Correct answer is: (C) WIFI.

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

Difficulty: Easy

Concept notes: WIFI is a technology that uses radio waves to provide wireless high-speed internet access.

Common Mistakes: A common mistake is confusing WIFI with other internet-related terms like HTML, ISP, or RAM, which do not use radio waves for internet connectivity.

Explanations: WIFI technology uses radio waves to transmit data between devices and a wireless router, providing high-speed internet access without the need for physical cables. This makes it a popular choice for home, office, and public internet access.

Option Analysis:

Option A: HTML is a markup language used for creating web pages and does not involve radio waves.
Option B: ISP stands for Internet Service Provider, which provides internet access but does not use radio waves directly.
Option C: WIFI uses radio waves to provide wireless high-speed internet access.
Option D: RAM is a type of computer memory and does not involve radio waves for internet connectivity.

4. Two or more computers connected to each other for sharing information form a .....

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

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Easy

Concept notes: A network is a collection of interconnected devices, such as computers, that can communicate and share resources.

Common Mistakes: A common misunderstanding is that a router or server alone can form a network. However, a network requires multiple devices to be interconnected.

Explanations: Two or more computers connected to each other for sharing information form a network. This is the fundamental definition of a network in computer science. A network allows devices to communicate and share resources, such as files, printers, and internet access.

Option Analysis:

Option A: A router is a device that directs data traffic between networks but does not form a network on its own.
Option B: A server is a computer that provides services to other computers on a network but does not form a network on its own.
Option C: A tunnel is a method of encapsulating data for secure transmission over a network but does not form a network on its own.
Option D: A network is the correct term for two or more computers connected to share information.

5. When encapsulating data using the OSI model as a reference, the MAC address of the sending and receiving hosts is identified at which layer?

Correct Answer: Correct answer is: (B) Layer 2.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Moderate

Concept notes: In the OSI model, Layer 2, known as the Data Link Layer, is responsible for handling the physical addressing of devices on a network, including the use of MAC addresses.

Common Mistakes: A common misunderstanding is that MAC addresses are handled at Layer 3 (Network Layer), which is incorrect. Layer 3 deals with IP addresses and routing, not MAC addresses.

Explanations: The Data Link Layer (Layer 2) is responsible for the encapsulation of data into frames and the use of MAC addresses to identify the sending and receiving hosts on a local network. This layer ensures that data is correctly transmitted between devices on the same network segment.

Option Analysis:

Option A: Layer 7 is the Application Layer, which deals with user applications and does not handle MAC addresses.
Option B: Layer 2 is the Data Link Layer, which correctly handles MAC addresses for local network communication.
Option C: Layer 4 is the Transport Layer, which deals with end-to-end communication and does not handle MAC addresses.
Option D: Layer 3 is the Network Layer, which deals with IP addresses and routing, not MAC addresses.

Mnemonic: MAC-2: MAC addresses are at Layer 2.

6. ..... are the pathways along which information flows in groups and teams and throughout an organization.

Correct Answer: Correct answer is: (C) Communication networks.

Exam Relevance: MBA exams, Management exams, Organizational Behavior exams

Difficulty: Moderate

Concept notes: Communication networks are the pathways through which information flows within groups, teams, and throughout an organization.

Common Mistakes: A common misunderstanding is to confuse communication networks with organizational structures or designs, which are broader concepts that include but are not limited to communication pathways.

Explanations: Communication networks specifically refer to the channels and methods through which information is exchanged within an organization. They are essential for ensuring that information flows efficiently and effectively, enabling coordination and collaboration among team members and departments.

Option Analysis:

Option A: Organizational structures refer to the formal arrangement of jobs within the organization, not the pathways of information flow.
Option B: Organizational architectures refer to the overall design and framework of an organization, which includes but is not limited to communication pathways.
Option C: Communication networks are the specific pathways through which information flows within an organization.
Option D: Organizational designs refer to the overall plan or blueprint of an organization, which encompasses various aspects including but not limited to communication networks.

7. How do computing devices or routers help packets reach their destination?

Correct Answer: Correct answer is: (B) By communicating with each other.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: In computer networks, computing devices and routers help packets reach their destination by communicating with each other. This communication involves exchanging routing information and forwarding packets based on the destination address.

Common Mistakes: A common misunderstanding is that devices physically connect to each other to forward packets, which is not accurate. Instead, they communicate to determine the best path for packet delivery.

Explanations: Computing devices and routers communicate with each other to exchange routing information and determine the best path for packet delivery. This communication ensures that packets are forwarded efficiently and reach their intended destination. The devices use protocols and standards to facilitate this communication, ensuring that packets are routed correctly across the network.

Option Analysis:

Option A: This is incorrect because devices do not physically connect to each other to forward packets. Instead, they communicate to determine the best path.
Option B: This is correct because devices communicate with each other to exchange routing information and forward packets.
Option C: While devices do work together based on agreed-upon standards, this option does not directly address the communication aspect required for packet delivery.
Option D: This is incorrect because reassembling packets at the destination is a separate process and does not describe how packets reach their destination.

8. What was the name of the first network connection?

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

Exam Relevance: Computer Networks Exams, CCNA, CISSP

Difficulty: Easy

Concept notes: ARPANET was the first network connection and the precursor to the modern internet.

Common Mistakes: A common mistake is confusing ARPANET with other acronyms that sound similar, such as APARNET or ANREPTA.

Explanations: ARPANET, which stands for Advanced Research Projects Agency Network, was the first network connection and was developed in the late 1960s by the United States Department of Defense. It was designed to allow multiple computers to communicate with each other and was the foundation for the development of the internet.

Option Analysis:

Option A: ANREPTA is not a recognized acronym in the context of computer networks.
Option B: APARNET is not a recognized acronym in the context of computer networks.
Option C: NETARPA is not a recognized acronym in the context of computer networks.
Option D: ARPANET is the correct answer as it was the first network connection.

Mnemonic: A: Advanced Research Projects Agency Network

9. Black Spots prevent good network signal. What are blackspots?

Correct Answer: Correct answer is: (C) Geographical features, such as mountains and hills can block signals.

Exam Relevance: CCNA, CompTIA Network+, CISSP

Difficulty: Moderate

Concept notes: Blackspots in computer networks refer to areas where the signal strength is weak or non-existent, leading to poor network performance.

Common Mistakes: A common misunderstanding is that blackspots are only caused by a lack of infrastructure or distance from cell towers, but geographical features can also significantly impact signal strength.

Explanations: Geographical features such as mountains and hills can obstruct the path of radio waves, leading to signal degradation or complete loss. This obstruction can create blackspots where network signals are weak or non-existent.

Option Analysis:

Option A: This option is incorrect because while rural areas and developing countries may lack infrastructure, this is not the only cause of blackspots.
Option B: This option is incorrect because while distance from cell towers can affect signal strength, it is not the only cause of blackspots.
Option C: This option is correct because geographical features can block signals, leading to blackspots.
Option D: This option is incorrect because one of the provided options (C) is correct.

10. Machine that places the request to access the data is generally called as .....

Correct Answer: Correct answer is: (B) Client Machine.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: In computer networks, a client machine is the device that requests and receives data from a server.

Common Mistakes: A common misunderstanding is that the server machine is the one making the request, but in fact, the server machine is the one that responds to the request.

Explanations: In a client-server model, the client machine initiates the request to access data or services from a server. The server machine then processes the request and sends the requested data back to the client. Therefore, the machine that places the request to access the data is called the client machine.

Option Analysis:

Option A: A server machine is the one that responds to the client's request, not the one that initiates the request.
Option B: A client machine is the one that initiates the request to access data from a server.
Option C: There is no specific term "Request Machine" in computer networking terminology.
Option D: The correct term is "Client Machine," so this option is incorrect.

Frequently Asked Questions

What is the OSI model and why is it important in computer networks?

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system. It is important because it provides a common language and structure for understanding and designing network communications.

How do MAC addresses function in network communication?

MAC addresses uniquely identify devices on a network at the data link layer. They are used to ensure that data packets are sent to the correct device within a local network.

What is the client-server model and how does it work?

The client-server model is a network architecture where one computer (the server) provides resources or services to other computers (clients) upon request. Clients send requests to the server, which processes the request and sends a response back to the client.

What is the role of routing in computer networks?

Routing is the process of selecting paths in a network along which to send network traffic. It involves forwarding data packets from their source to their destination through the most efficient route.

How does WIFI technology enable wireless internet access?

WIFI technology uses radio waves to transmit data between devices and a wireless access point, allowing users to connect to the internet without the need for physical cables.

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