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Unit Viii Information And Communication Technology (Ict)
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Computer Networks – Quiz 38
Computer Networks Quiz 38 (10 MCQs)
This set of multiple-choice questions evaluates understanding of computer networks, including the OSI model, TCP/IP suite, and data transmission processes. It covers network components, resource sharing, and the functions of the Application and Transport layers. The questions assess knowledge of protocols like TCP and UDP, network performance, and the role of routers in packet switching and forwarding.
Quiz Instructions
Select an option to see the correct answer instantly.
1.
The means through which data is sent from one location to another iscalled transmission medium.
Show Answer
Correct Answer:
Correct answer is: (A) True.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
In computer networks, the transmission medium is the physical path through which data is sent from one location to another.
Common Mistakes:
A common misunderstanding is that the transmission medium only refers to wireless signals, but it includes both wired and wireless methods.
Explanations:
The transmission medium in computer networks refers to the physical or wireless pathway used to transmit data between devices. This includes cables, optical fibers, and wireless signals. Therefore, the statement that the means through which data is sent from one location to another is called the transmission medium is true.
Option Analysis:
Option A:
This option is correct because the transmission medium is indeed the means through which data is sent from one location to another in computer networks.
Option B:
This option is incorrect because the statement accurately describes the transmission medium in computer networks.
2.
What is a major goal of a router?
A) Instantaneous transmission.
B) Scalability.
C) Fault multiplication.
D) Packet quantization.
Show Answer
Correct Answer:
Correct answer is: (B) Scalability.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Moderate
Concept notes:
Scalability is a key goal of a router in computer networks. It refers to the ability of the router to handle an increasing amount of work or to be readily enlarged.
Common Mistakes:
A common misunderstanding is that routers are primarily focused on instantaneous transmission, but while speed is important, scalability is a more fundamental goal.
Explanations:
A router's primary function is to efficiently forward data packets between different networks. Scalability ensures that the router can handle increasing network traffic and accommodate growing network sizes without significant performance degradation. This is crucial for maintaining network efficiency and reliability as the network expands.
Option Analysis:
Option A:
Instantaneous transmission is not a major goal of a router. While speed is important, routers are designed to handle traffic efficiently rather than guaranteeing instantaneous transmission.
Option B:
Scalability is a major goal of a router, as it ensures the router can handle increasing network traffic and accommodate growing network sizes.
Option C:
Fault multiplication is not a goal of a router. Routers are designed to minimize faults and ensure reliable data transmission.
Option D:
Packet quantization is not a goal of a router. Routers focus on routing and forwarding packets, not quantizing them.
3.
When information is shared electronically between computers it is known as:
A) E-commerce.
B) E-tailer.
C) M-commerce.
D) Digital communication.
Show Answer
Correct Answer:
Correct answer is: (D) Digital communication.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Easy
Concept notes:
Digital communication refers to the transmission of information using digital signals over a network.
Common Mistakes:
A common mistake is confusing digital communication with e-commerce, which specifically refers to buying and selling goods and services online.
Explanations:
Digital communication is the correct term for the electronic sharing of information between computers. It encompasses the transmission of data, text, images, and other forms of information over a network using digital signals. This term is broad and applies to various forms of electronic communication, including email, file transfers, and data exchange over the internet.
Option Analysis:
Option A:
E-commerce refers to the buying and selling of goods and services over the internet, not the general sharing of information.
Option B:
E-tailer refers to an online retailer, which is a specific type of e-commerce business, not a general term for information sharing.
Option C:
M-commerce refers to mobile commerce, which is a subset of e-commerce involving transactions conducted via mobile devices, not general information sharing.
Option D:
Digital communication is the correct term for the electronic sharing of information between computers.
4.
In a computer network, Latency is .....
A) The time it takes for data or a request to go from the source to the destination.
B) The maximum rate of data transfer across a given path.
C) The number of bits of data that are sent each second.
D) None of above.
Show Answer
Correct Answer:
Correct answer is: (A) The time it takes for data or a request to go from the source to the destination.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Easy
Concept notes:
Latency in computer networks refers to the time delay before a transfer of data begins following an instruction for its transfer.
Common Mistakes:
A common mistake is confusing latency with bandwidth, which is the maximum rate of data transfer.
Explanations:
Latency is defined as the time it takes for data or a request to travel from the source to the destination. This includes the time taken for the data to be processed and transmitted through the network. It is a critical measure of network performance, often affecting the responsiveness of applications and services.
Option Analysis:
Option A:
Correct. Latency is the time it takes for data or a request to go from the source to the destination.
Option B:
Incorrect. This describes bandwidth, not latency.
Option C:
Incorrect. This describes data transfer rate, not latency.
Option D:
Incorrect. The correct answer is provided in Option A.
5.
Which layer of OSI determines the interface of the system with the user .....
A) Application.
B) Data link.
C) Session.
D) None of these.
Show Answer
Correct Answer:
Correct answer is: (A) Application.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Easy
Concept notes:
The Application layer of the OSI model is responsible for providing services directly to the end user or application.
Common Mistakes:
A common mistake is confusing the Application layer with the Session layer, which manages sessions between applications.
Explanations:
The Application layer is the highest layer in the OSI model and is directly responsible for interfacing with user applications and services. It provides services such as file transfers, email, and web browsing to the user. The other layers, such as the Data Link and Session layers, handle lower-level functions and do not directly interact with the user.
Option Analysis:
Option A:
Correct. The Application layer is responsible for the interface with the user.
Option B:
Incorrect. The Data Link layer is responsible for reliable transfer of data between nodes on the same network.
Option C:
Incorrect. The Session layer manages sessions between applications but does not directly interface with the user.
Option D:
Incorrect. The correct answer is provided in the options.
6.
It is two or more computers connected together for the purpose of communicating and sharing resources
A) Client.
B) Server.
C) Network.
D) Reciever.
Show Answer
Correct Answer:
Correct answer is: (C) Network.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
A network is a collection of interconnected computing devices that can communicate with each other and share resources.
Common Mistakes:
A common misunderstanding is that a network is only about communication, but it also involves sharing resources such as printers, files, and internet access.
Explanations:
A network is defined as two or more computers connected together for the purpose of communicating and sharing resources. This aligns with the definition provided in the question. A client, server, and receiver are components or roles within a network, but they do not encompass the entire concept of a network.
Option Analysis:
Option A:
A client is a device that requests services from a server and does not define a network.
Option B:
A server is a device that provides services to clients and does not define a network.
Option C:
A network is a collection of interconnected computing devices that can communicate and share resources, which matches the description in the question.
Option D:
A receiver is a device that receives data from a sender and does not define a network.
7.
What happens to data as it travels across the internet to reach your device?
A) It remains in a single piece.
B) It is broken down into packets and reassembled.
C) It is encrypted and decrypted.
D) It is stored temporarily on multiple servers.
Show Answer
Correct Answer:
Correct answer is: (B) It is broken down into packets and reassembled.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Moderate
Concept notes:
Data transmission over the internet involves breaking data into smaller units called packets. These packets are then transmitted independently across the network and reassembled at the destination.
Common Mistakes:
A common misunderstanding is that data travels as a single, continuous stream without being broken down.
Explanations:
When data is sent over the internet, it is divided into smaller units called packets. Each packet contains a portion of the data along with header information that includes the source and destination addresses. These packets travel independently through the network, potentially taking different routes. Upon reaching the destination, the packets are reassembled in the correct order to reconstruct the original data. This process ensures efficient and reliable data transmission.
Option Analysis:
Option A:
Incorrect. Data is not transmitted as a single piece but is broken down into smaller packets.
Option B:
Correct. Data is broken down into packets and reassembled at the destination.
Option C:
Incorrect. While data can be encrypted, this is not the primary method of data transmission over the internet.
Option D:
Incorrect. Data is not stored temporarily on multiple servers; it is transmitted in packets.
8.
Which piece of Packet Header data ensures the packet goes to the correct computer?
A) Packet Number.
B) Recipient Address.
C) Size of Packet.
D) None of the above.
Show Answer
Correct Answer:
Correct answer is: (B) Recipient Address.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Easy
Concept notes:
In computer networks, the recipient address in the packet header ensures that the packet is delivered to the correct destination computer.
Common Mistakes:
A common misunderstanding is that the packet number or size of the packet is responsible for directing the packet to the correct computer. However, these fields do not determine the destination.
Explanations:
The recipient address in the packet header contains the IP address or MAC address of the destination computer. This address is used by routers and switches to forward the packet along the correct path until it reaches the intended recipient.
Option Analysis:
Option A:
Packet Number is used for sequencing and reassembly of packets, not for determining the destination.
Option B:
Recipient Address is the correct choice as it specifies the destination of the packet.
Option C:
Size of Packet is used for determining the amount of data in the packet, not for directing it to the correct computer.
Option D:
None of the above is incorrect because the Recipient Address is the correct choice.
9.
Identify a common example of a wired medium of information transmission.
A) Bluetooth.
B) Wi-Fi.
C) Ethernet cable.
D) Satellite communication.
Show Answer
Correct Answer:
Correct answer is: (C) Ethernet cable.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
A wired medium of information transmission refers to a physical connection used to transfer data between devices. Ethernet cables are a common example of such a medium.
Common Mistakes:
A common mistake is to confuse wireless technologies like Bluetooth and Wi-Fi with wired mediums. These are wireless technologies and do not involve a physical cable connection.
Explanations:
Ethernet cables are a wired medium used in computer networks to transmit data between devices. They provide a physical connection that ensures reliable and fast data transfer. Bluetooth and Wi-Fi are wireless technologies, and satellite communication is a form of wireless transmission, making them incorrect choices.
Option Analysis:
Option A:
Bluetooth is a wireless technology and not a wired medium.
Option B:
Wi-Fi is a wireless technology and not a wired medium.
Option C:
Ethernet cable is a wired medium used for data transmission in computer networks.
Option D:
Satellite communication is a wireless technology and not a wired medium.
10.
Which is the other common Transport level protocol in the TCP/IP suite, other that TCP?
A) UDP.
B) IP.
C) HTTPS.
D) SSH.
Show Answer
Correct Answer:
Correct answer is: (A) UDP.
Exam Relevance:
CCNA, CISSP, CompTIA Network+
Difficulty:
Easy
Concept notes:
The Transport layer in the TCP/IP suite is responsible for end-to-end communication between applications. The two main protocols at this layer are TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
Common Mistakes:
A common mistake is to confuse the Transport layer protocols with other layers in the TCP/IP suite, such as the Internet layer (IP) or the Application layer (HTTPS, SSH).
Explanations:
UDP is the other common Transport level protocol in the TCP/IP suite, alongside TCP. UDP is a connectionless protocol that provides a faster, but less reliable, service compared to TCP. It is often used for applications that require low latency, such as real-time video streaming or online gaming.
Option Analysis:
Option A:
UDP is the correct answer as it is the other common Transport level protocol in the TCP/IP suite.
Option B:
IP is the Internet Protocol, which operates at the Internet layer, not the Transport layer.
Option C:
HTTPS is a secure version of HTTP and operates at the Application layer, not the Transport layer.
Option D:
SSH is a secure protocol used for remote login and operates at the Application layer, not the Transport layer.
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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 that describes how information is transmitted between different devices in a network. It consists of seven layers, each responsible for specific network functions, and it helps in understanding and troubleshooting network issues.
How does packet switching work in data transmission?
Packet switching divides data into smaller units called packets, which are transmitted independently over a network. Each packet includes a header with routing information, allowing it to be sent along the most efficient path to its destination.
What is the role of a router in a network?
A router is a device that forwards data packets between different networks. It uses routing tables to determine the best path for data to travel, ensuring efficient and reliable data transfer between interconnected devices.
What is network latency and how does it affect network performance?
Network latency refers to the time delay in transmitting data across a network. High latency can slow down data transfer and affect the overall performance of network applications, making it crucial for network optimization.
What is the difference between TCP and UDP in data transfer?
TCP (Transmission Control Protocol) ensures reliable data transfer with error checking and retransmission, while UDP (User Datagram Protocol) is faster but less reliable, as it does not guarantee delivery or order of packets.