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Unit Viii Information And Communication Technology (Ict)
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Computer Networks – Quiz 46
Computer Networks Quiz 46 (10 MCQs)
This set of multiple-choice questions evaluates understanding of the Physical layer and OSI model, including network hardware, communication standards, and data transmission rules. It covers concepts such as Wi-Fi, radio waves, fibre optic cables, and network protocols, assessing knowledge of data communication, resource sharing, and network performance.
Quiz Instructions
Select an option to see the correct answer instantly.
1.
What type of signals are transmitted across fibre optic cables?
A) Electric.
B) Light.
C) Sound.
D) Radio.
Show Answer
Correct Answer:
Correct answer is: (B) Light.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Easy
Concept notes:
Fibre optic cables transmit signals using light.
Common Mistakes:
A common misunderstanding is that fibre optic cables use electrical signals like traditional copper cables.
Explanations:
Fibre optic cables use light to transmit data. The light travels through the core of the cable, which is made of glass or plastic, and is guided by the cladding that surrounds the core. This method of transmission is highly efficient and can carry large amounts of data over long distances with minimal loss.
Option Analysis:
Option A:
Electric signals are not used in fibre optic cables. They are used in traditional copper cables.
Option B:
Light is the correct signal type used in fibre optic cables.
Option C:
Sound signals are not used in fibre optic cables. They are used in acoustic communication systems.
Option D:
Radio signals are not used in fibre optic cables. They are used in wireless communication systems.
2.
Advantages of Networking are:
A) Data Sharing.
B) File Transfer.
C) Hardware Sharing.
D) All of these.
Show Answer
Correct Answer:
Correct answer is: (D) All of these.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
Networking allows for various benefits including data sharing, file transfer, and hardware sharing.
Common Mistakes:
A common misunderstanding is that networking only provides one or two of these benefits, rather than all of them.
Explanations:
Networking in computer systems enables multiple computers to connect and communicate with each other. This connectivity allows for the sharing of data, files, and hardware resources. Data sharing allows users to access and exchange information across different systems. File transfer enables the movement of files between different computers on the network. Hardware sharing allows multiple users to access and use the same hardware resources, such as printers or storage devices. Therefore, all of these benefits are provided by networking.
Option Analysis:
Option A:
Data Sharing is a key benefit of networking.
Option B:
File Transfer is another important benefit of networking.
Option C:
Hardware Sharing is also a significant advantage of networking.
Option D:
All of these benefits are provided by networking.
3.
What is a network in the context of computer systems?
A) A group of two or more computer systems linked together.
B) A single computer connected to the Internet.
C) A type of computer hardware.
D) A software application for communication.
Show Answer
Correct Answer:
Correct answer is: (A) A group of two or more computer systems linked together.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Very Easy
Concept notes:
A network in the context of computer systems refers to a group of interconnected devices that can communicate and share resources.
Common Mistakes:
A common misunderstanding is that a network must involve the Internet, but a network can be a local setup without Internet access.
Explanations:
A network is defined as a group of two or more computer systems linked together to share resources and information. This definition encompasses various types of networks, such as local area networks (LANs), wide area networks (WANs), and the Internet itself. The key aspect is the interconnection and communication between multiple devices.
Option Analysis:
Option A:
Correct. This accurately defines a network as a group of interconnected computer systems.
Option B:
Incorrect. A single computer connected to the Internet is not a network; it is an individual device accessing a network.
Option C:
Incorrect. A network is not a type of hardware but a system of interconnected devices.
Option D:
Incorrect. A software application for communication is not a network; it is a tool that can be used within a network.
4.
Wi-Fi is a wireless signal that sends information using what type of waves?
A) Radio.
B) Ocean.
C) Micro.
D) None of above.
Show Answer
Correct Answer:
Correct answer is: (A) Radio.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
Wi-Fi technology uses radio waves to transmit data wirelessly between devices.
Common Mistakes:
A common misunderstanding is that Wi-Fi uses some other form of wave, such as light or sound waves, instead of radio waves.
Explanations:
Wi-Fi operates by transmitting data using radio waves, which are a type of electromagnetic wave. These waves are capable of carrying information over short distances and are used in various wireless communication technologies, including Wi-Fi.
Option Analysis:
Option A:
Correct. Wi-Fi uses radio waves to transmit data.
Option B:
Incorrect. Ocean waves are not used in Wi-Fi technology.
Option C:
Incorrect. Micro waves are a different type of electromagnetic wave and are not the primary type used in Wi-Fi.
Option D:
Incorrect. The correct answer is provided in the options.
5.
Transmission of data in one direction is called
A) Simplex.
B) Duplex.
C) Triplex.
D) None of these.
Show Answer
Correct Answer:
Correct answer is: (A) Simplex.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Easy
Concept notes:
In computer networks, simplex communication refers to the transmission of data in one direction only.
Common Mistakes:
A common misunderstanding is confusing simplex with duplex, which allows for two-way communication.
Explanations:
Simplex communication is characterized by data transmission in one direction only. This means that the communication channel is used exclusively for sending data from one point to another without the ability to send data back in the opposite direction. This type of communication is often used in scenarios where only one-way data transmission is necessary, such as in broadcast systems or in some types of sensor networks.
Option Analysis:
Option A:
Simplex is the correct term for one-way data transmission.
Option B:
Duplex allows for two-way communication, which is not one-directional.
Option C:
Triplex is not a standard term in computer networks for data transmission modes.
Option D:
None of these is incorrect as Simplex is the correct term.
6.
What is latency?
A) The time it takes for a bit to travel from one computer to another.
B) When you get to school after 8:15.
C) How large a computer file is.
D) None of above.
Show Answer
Correct Answer:
Correct answer is: (A) The time it takes for a bit to travel from one computer to another.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Easy
Concept notes:
Latency in computer networks refers to the time delay experienced in the communication of data over a network.
Common Mistakes:
A common misunderstanding is that latency is related to the size of a file or the time of arrival at a physical location.
Explanations:
Latency is the time it takes for a bit to travel from one computer to another. This is a fundamental concept in computer networks, as it affects the overall performance and responsiveness of the network. It is important to understand that latency is not related to the size of a file or the time of arrival at a physical location, but rather the time it takes for data to be transmitted between two points.
Option Analysis:
Option A:
Correct. Latency is the time it takes for a bit to travel from one computer to another.
Option B:
Incorrect. This is unrelated to computer networks and refers to a physical arrival time.
Option C:
Incorrect. This refers to the size of a file, which is unrelated to latency.
Option D:
Incorrect. This is not the correct answer as Option A is correct.
7.
An agreed-upon set of procedures and rules
A) TCP.
B) IP.
C) WEB.
D) Protocol.
Show Answer
Correct Answer:
Correct answer is: (D) Protocol.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Easy
Concept notes:
A protocol in computer networks is a set of rules and procedures that govern how data is transmitted and received over a network.
Common Mistakes:
A common misunderstanding is confusing protocol with specific protocols like TCP or IP, which are examples of protocols rather than the definition of a protocol itself.
Explanations:
A protocol is an agreed-upon set of procedures and rules that ensure data is transmitted and received correctly between different devices in a network. This definition aligns with the concept of a protocol in computer networks.
Option Analysis:
Option A:
TCP is a specific protocol used for reliable data transmission, not the general concept of a protocol.
Option B:
IP is another specific protocol used for addressing and routing packets, not the general concept of a protocol.
Option C:
WEB is not a protocol but refers to the World Wide Web, which is a system of interlinked hypertext documents.
Option D:
Protocol is the correct term for an agreed-upon set of procedures and rules in computer networks.
8.
Which layer in the OSI model includes the cable and network adapters?
A) Physical.
B) Session.
C) Application.
D) Presentation.
Show Answer
Correct Answer:
Correct answer is: (A) Physical.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
The Physical layer in the OSI model is responsible for the transmission and reception of unstructured raw data between a device and a physical transmission medium.
Common Mistakes:
A common mistake is confusing the Physical layer with other layers such as the Data Link layer, which deals with the physical addressing and network topology.
Explanations:
The Physical layer includes the hardware components such as cables, network adapters, and connectors. These components are responsible for the physical transmission of data over the network.
Option Analysis:
Option A:
Correct. The Physical layer includes the cable and network adapters.
Option B:
Incorrect. The Session layer manages sessions between applications.
Option C:
Incorrect. The Application layer provides services directly to the user.
Option D:
Incorrect. The Presentation layer deals with data representation and encryption.
9.
What is a network?
A) Group of computers that are connected in a small area, such as a school or an office.
B) Group of web pages that are joined together.
C) Spot on a web page that when clicked will display a web page.
D) Group of computers that are joined so that people can share their work.
Show Answer
Correct Answer:
Correct answer is: (D) Group of computers that are joined so that people can share their work.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
A network is a system of interconnected devices that can communicate and share resources.
Common Mistakes:
A common misunderstanding is that a network is limited to a small area or is only about web pages.
Explanations:
A network is defined as a group of computers and other devices that are connected together to share resources and information. This definition aligns with option D, which states that a network is a group of computers joined so that people can share their work. This sharing can include files, printers, and other resources, and it can extend beyond a small area to include larger geographical regions.
Option Analysis:
Option A:
This option is incorrect because it limits the definition of a network to a small area, such as a school or office, which is too narrow. Networks can span much larger areas.
Option B:
This option is incorrect because it describes a website or a collection of web pages, not a network of computers.
Option C:
This option is incorrect because it describes a hyperlink, not a network.
Option D:
This option is correct because it accurately describes a network as a group of computers joined to share work and resources.
10.
It is the sender of the message.
A) Barrier.
B) Originator.
C) Receiver.
D) Sender.
Show Answer
Correct Answer:
Correct answer is: (D) Sender.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Easy
Concept notes:
In computer networks, the sender is the entity that initiates the transmission of a message.
Common Mistakes:
A common misunderstanding is confusing the sender with the receiver, who is the entity that receives the message.
Explanations:
The sender is the originator of the message in a communication process. It is responsible for initiating the transmission of data or information over a network. The term "sender" directly refers to the entity that sends the message, making it the correct answer.
Option Analysis:
Option A:
Barrier is not related to the originator of the message. It could refer to an obstacle or interference in the communication process.
Option B:
Originator is synonymous with sender, but the question specifically asks for the term "sender."
Option C:
Receiver is the entity that receives the message, not the one that sends it.
Option D:
Sender is the entity that initiates the transmission of the message, which is the correct term in this context.
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Frequently Asked Questions
What is the OSI model and how does it relate to computer networks?
The OSI model is a conceptual framework used to understand and standardize the functions of a telecommunication or computing system. It consists of seven layers, each responsible for specific network functions, facilitating data communication between different devices.
How does Wi-Fi enable wireless communication in computer networks?
Wi-Fi uses radio waves to transmit data between devices and access points, allowing for wireless communication within a network. This technology enables devices to connect to the internet and share resources without the need for physical cables.
What is the role of network protocols in data transmission?
Network protocols define the rules and standards for data transmission, ensuring that data is sent and received correctly between devices. They govern how data is formatted, addressed, transmitted, routed, and received over a network.
How does fibre optic cable improve data transmission?
Fibre optic cables use light to transmit data, which allows for faster and more secure data transmission over longer distances compared to traditional copper cables. This technology is particularly useful in high-speed networks and long-distance communication.
What is network latency and how does it affect data transmission?
Network latency refers to the time delay experienced in data transmission between the sender and receiver. High latency can slow down communication and affect the performance of real-time applications such as video conferencing or online gaming.