Computer networking MCQ

1441. Which network is formed with a mobile and Laptop

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

Exam Relevance: IT Essentials, CompTIA A+, Network+ Certification

Difficulty: Easy

Concept notes: A Personal Area Network (PAN) is a network that connects devices in a small area, typically within a few meters, such as within a person's workspace or home.

Common Mistakes: Students may confuse PAN with LAN, thinking that any network within a small area is a LAN. However, LAN typically refers to a network that connects devices within a larger area, such as an office or school.

Explanations: A Personal Area Network (PAN) is designed to connect devices within a small area, such as a mobile device and a laptop. This network is typically used for short-range communication and is limited to a personal workspace or immediate vicinity. Therefore, the correct answer is PAN.

Option Analysis:

Option A: LAN (Local Area Network) is incorrect because it refers to a network that connects devices within a larger area, such as an office or school, not a personal workspace.
Option B: PAN (Personal Area Network) is correct because it connects devices within a small personal area, such as a mobile device and a laptop.
Option C: MAN (Metropolitan Area Network) is incorrect because it refers to a network that spans a larger geographical area, such as a city or town.
Option D: WAN (Wide Area Network) is incorrect because it refers to a network that spans a very large geographical area, such as multiple cities or countries.

Mnemonic: PAN: Personal Area Network, Personal Devices Nearby

1442. An advantage of a mesh network is that if a cable breaks the devices can find another route through the network because there is no central switch.

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

Exam Relevance: AP Computer Science Principles, A+ Certification, CCNA

Difficulty: Moderate

Concept notes: In a mesh network, each device is connected to multiple other devices, allowing for multiple paths between any two points.

Common Mistakes: Students may confuse mesh networks with star or bus topologies, where a central switch or hub is required for communication.

Explanations: A mesh network allows for redundancy and alternative routes in case of a cable failure. Since there is no central switch, if one connection breaks, data can still be transmitted through other available paths. This makes the network more resilient and reliable.

Option Analysis:

Option A: This option correctly identifies the advantage of a mesh network, which is its ability to reroute data in case of a cable break.
Option B: This option is incorrect because it contradicts the inherent redundancy and fault tolerance of a mesh network.

Mnemonic: Mesh = Multiple Paths

1443. What is needed if the computer does not have a built-in network chip on its motherboard?

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

Exam Relevance: CompTIA A+, CCNA, Network+

Difficulty: Easy

Concept notes: A NIC (Network Interface Card) is required to connect a computer to a network when the motherboard does not have a built-in network chip.

Common Mistakes: Students may confuse a NIC with other networking devices like a WAP (Wireless Access Point) or a router, which are not directly installed on a computer to enable network connectivity.

Explanations: A NIC is a hardware component that allows a computer to connect to a network. If a computer's motherboard lacks a built-in network chip, a NIC must be installed to provide network connectivity. Other options like WAP, router, and switch are network devices that facilitate network communication but are not installed directly on a computer to enable network connectivity.

Option Analysis:

Option A: NIC is the correct answer as it is the hardware component needed to connect a computer to a network when the motherboard does not have a built-in network chip.
Option B: WAP (Wireless Access Point) is a device that allows wireless devices to connect to a wired network but is not installed on a computer.
Option C: Router is a device that forwards data packets between networks but is not installed on a computer.
Option D: Switch is a device that connects devices on a network but is not installed on a computer.

Mnemonic: NIC - Network Interface Card

1444. Choose correct sentence

Correct Answer: Correct answer is: (C) Both sentences are correct.

Exam Relevance: CCNA, CCNP, CISSP

Difficulty: Moderate

Concept notes: OSPF (Open Shortest Path First) is a dynamic routing protocol used in IP networks. It does not use UDP or TCP for its operations.

Common Mistakes: Students may mistakenly believe that OSPF uses UDP or TCP for its operations, as these are common transport protocols in networking.

Explanations: OSPF is a dynamic routing protocol, which means it can automatically adjust to changes in the network topology. It does not use UDP or TCP for its operations; instead, it uses IP directly at the network layer. This makes OSPF more efficient and reliable for routing decisions.

Option Analysis:

Option A: Correct. OSPF is indeed a dynamic routing protocol.
Option B: Correct. OSPF does not use UDP or TCP for its operations.
Option C: Correct. Both sentences are correct as explained above.

1445. Connects multiple computers together in a network. Only sends data to the specific computer address

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

Exam Relevance: CCNA, CompTIA Network+, Network Fundamentals

Difficulty: Easy

Concept notes: A switch is a networking device that connects multiple computers and forwards data only to the specific computer address, improving network efficiency and reducing congestion.

Common Mistakes: Students may confuse a switch with a hub, which broadcasts data to all connected devices rather than directing it to specific addresses.

Explanations: A switch is designed to connect multiple computers in a network and only sends data to the specific computer address, making it more efficient than a hub. This targeted data transmission reduces network congestion and improves overall network performance.

Option Analysis:

Option A: Correct. A switch connects multiple computers and sends data only to the specific computer address.
Option B: Incorrect. A hub broadcasts data to all connected devices, not just the specific address.
Option C: Incorrect. A repeater amplifies signals but does not direct data to specific addresses.
Option D: Incorrect. A modem converts digital signals to analog and vice versa for internet connectivity, not for directing data within a network.

Mnemonic: Switch = Specific

1446. What is Bandwidth? Select the most accurate answer

Correct Answer: Correct answer is: (C) A measurement of the amount of data which can be transferred across a network at any given time.

Exam Relevance: Networking exams, Computer Science exams, Telecommunications exams

Difficulty: Moderate

Concept notes: Bandwidth is a measure of the capacity of a communication channel to transmit data. It indicates the maximum amount of data that can be transferred over a network within a given time period.

Common Mistakes: Students often confuse bandwidth with the speed of a network, which is a common misconception. Bandwidth is not about how fast data travels but about the amount of data that can be transferred at any given time.

Explanations: Bandwidth is defined as the amount of data that can be transferred across a network at any given time. It is a measure of the capacity of a communication channel, not the speed at which data travels. This capacity is crucial for understanding the performance and efficiency of data transfer in networks.

Option Analysis:

Option A: This option is incorrect because bandwidth is not a direct measurement of speed but rather the capacity for data transfer.
Option B: This option is incorrect because bandwidth does not measure storage capacity; it measures the capacity for data transfer.
Option C: This option is correct because it accurately defines bandwidth as the amount of data that can be transferred across a network at any given time.
Option D: This option is incorrect because it describes the total amount of data traveling across a network at a given time, which is not the definition of bandwidth.

1447. An organization that provides access to the internet, such as cable, providers (Spectrum, Comcast, AT&T, Xfinity)

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

Exam Relevance: Networking exams, Computer Science exams, IT certifications

Difficulty: Easy

Concept notes: ISPs, or Internet Service Providers, are organizations that provide access to the internet to individuals and businesses.

Common Mistakes: Students may confuse ISPs with other internet-related acronyms like TCP or IP, which are protocols rather than service providers.

Explanations: ISPs are the organizations that provide internet access to users. They are responsible for delivering internet services to homes and businesses. The other options, TCP, IP, and TCP/IP, are protocols used for communication over the internet, not service providers.

Option Analysis:

Option A: TCP is a protocol used for reliable data transmission over the internet, not a service provider.
Option B: IP is a protocol used for addressing and routing data packets over the internet, not a service provider.
Option C: ISPs are organizations that provide internet access to users, making them the correct answer.
Option D: TCP/IP is a suite of protocols used for internet communication, not a service provider.

1448. When information is split up to be sent over the internet the parts are called

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

Exam Relevance: AP Computer Science Principles, A+ Certification, CCNA

Difficulty: Easy

Concept notes: When information is transmitted over the internet, it is divided into smaller units called packets. Each packet contains a portion of the original data and is sent independently over the network.

Common Mistakes: Students may confuse packets with other terms like "packages" or "bits," which are different concepts in data transmission.

Explanations: Packets are the fundamental units of data transmission in computer networks. When information is sent over the internet, it is broken down into these smaller units to facilitate efficient and reliable transmission. Each packet contains a portion of the original data along with header information that includes source and destination addresses, sequence numbers, and other control information. This allows the packets to be routed independently and reassembled at the destination to reconstruct the original information.

Option Analysis:

Option A: Packages is incorrect because it is not a technical term used in data transmission over the internet.
Option B: Packets is the correct term for the smaller units of data used in internet communication.
Option C: Bits are the smallest unit of data, but they do not represent the division of information for transmission over the internet.
Option D: Elephants is incorrect and is not related to data transmission terminology.

Mnemonic: Packets Pack the Payload

1449. A small network for a home or a small business is an example of

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

Exam Relevance: IT Essentials, CompTIA A+, Network+ Certification

Difficulty: Easy

Concept notes: A LAN (Local Area Network) is a computer network that connects computers and devices within a limited area such as a home, school, or office building.

Common Mistakes: Students may confuse LAN with WAN (Wide Area Network) or MAN (Metropolitan Area Network), which cover larger geographical areas.

Explanations: A small network for a home or a small business is an example of a LAN because it connects devices within a limited area, such as a single building or a small group of buildings. LANs are designed for high-speed data transfer and are typically owned and managed by a single organization.

Option Analysis:

Option A: Correct. A LAN is appropriate for small networks in homes or small businesses.
Option B: Incorrect. A WAN (Wide Area Network) covers a larger geographical area, such as cities or countries.
Option C: Incorrect. A MAN (Metropolitan Area Network) covers a larger area than a LAN but smaller than a WAN, typically a city or large campus.

Mnemonic: LAN: Local Area Network, think "Local" for "Limited" area.

1450. Which of the following is LEAST likely to indicate a phishing attack?

Correct Answer: Correct answer is: (B) An email from your bank asks you to call the number on your card to verify a transaction.

Exam Relevance: CISSP, CompTIA Security+, CISA

Difficulty: Moderate

Concept notes: Phishing attacks often involve requests for personal information or actions that could compromise security. A legitimate bank would typically ask you to call a known number on your card rather than clicking on a link or providing sensitive information via email.

Common Mistakes: Students may mistakenly believe that any email asking for personal information is a phishing attempt, without considering the context and the method of verification.

Explanations: A legitimate bank would not ask for sensitive information via email but would instead direct you to call a known number on your card to verify a transaction. This method ensures that the communication is secure and reduces the risk of phishing. The other options involve requests for personal information or actions that could compromise security, which are typical characteristics of phishing attacks.

Option Analysis:

Option A: This is a common phishing tactic where attackers try to trick users into clicking on a malicious link to reset their password.
Option B: This is a legitimate method used by banks to verify transactions, as it involves calling a known number on the card, which is secure.
Option C: Asking for sensitive information like a social security number via email is a red flag for phishing.
Option D: Requests to provide bank account numbers in exchange for prizes are typical phishing tactics.

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Computer networking MCQ - Set 145

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