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Unit Viii Information And Communication Technology (Ict)
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Network Devices – Quiz 16
Network Devices Quiz 16 (10 MCQs)
This set of multiple-choice questions evaluates understanding of data transmission, signal conversion, and network devices, including Layer 2 switching, MAC address forwarding, OSI model layers, and network connectivity. Concepts such as data link layer, network routing, and cable types are also covered, testing knowledge of network infrastructure and data packet forwarding.
Quiz Instructions
Select an option to see the correct answer instantly.
1.
Switch works in which layer of the OSI model?
A) Physical layer.
B) Session layer.
C) Data link layer.
D) None.
Show Answer
Correct Answer:
Correct answer is: (C) Data link layer.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
Switches operate at the Data Link layer (Layer 2) of the OSI model. They use MAC addresses to forward data frames to the correct destination within a local network.
Common Mistakes:
A common mistake is to confuse switches with routers, which operate at the Network layer (Layer 3) of the OSI model.
Explanations:
Switches function at the Data Link layer by examining the MAC addresses in the frames they receive. They use this information to make forwarding decisions, directing data to the appropriate device on the network. This layer is responsible for physical addressing and network topology.
Option Analysis:
Option A:
The Physical layer (Layer 1) deals with the physical transmission of data, such as voltage levels and physical connections. Switches do not operate at this layer.
Option B:
The Session layer (Layer 5) manages sessions between applications. Switches do not operate at this layer.
Option C:
The Data link layer (Layer 2) is where switches operate, using MAC addresses to forward data frames.
Option D:
This option is incorrect as switches do operate in a specific layer of the OSI model.
2.
What are the main functions of a router?
A) Filter the data stream, and control communications that go through the network.
B) Connect computers that are within the same network and have many ports.
C) Forward packages and find the best path between networks.
D) Send and process data between computers through a telephone line.
Show Answer
Correct Answer:
Correct answer is: (C) Forward packages and find the best path between networks.
Exam Relevance:
CCNA, CompTIA Network+, CISSP
Difficulty:
Moderate
Concept notes:
A router is a network device that forwards data packets between networks and determines the best path for data to travel.
Common Mistakes:
A common misunderstanding is that routers only connect computers within the same network, which is incorrect. Routers are designed to connect different networks and route data between them.
Explanations:
Routers are essential for connecting different networks and ensuring data packets are sent to the correct destination. They use routing protocols to determine the best path for data to travel, ensuring efficient and reliable communication between networks.
Option Analysis:
Option A:
This describes a function more closely associated with a firewall or a switch, not a router.
Option B:
This describes a function more closely associated with a switch or a hub, not a router.
Option C:
This accurately describes the primary functions of a router: forwarding data packets and determining the best path between networks.
Option D:
This describes a function more closely associated with a modem, not a router.
3.
What type of cable consists of a center wire surrounded by insulation and then a grounded shield of braided wire?
A) Twisted Pairs.
B) Coaxial Cable.
C) Optical Fiber.
D) Wireless Technologies.
Show Answer
Correct Answer:
Correct answer is: (B) Coaxial Cable.
Exam Relevance:
CCNA, CompTIA Network+, Network Fundamentals
Difficulty:
Easy
Concept notes:
Coaxial cable is a type of cable that consists of a center conductor wire surrounded by insulation, followed by a grounded shield of braided wire.
Common Mistakes:
A common mistake is confusing coaxial cable with twisted pair cables, which do not have a central conductor surrounded by a braided shield.
Explanations:
Coaxial cable is designed with a central conductor wire that is surrounded by insulation. This insulation is then encased by a grounded shield of braided wire. This structure provides excellent protection against electromagnetic interference and allows for high-speed data transmission. The other options do not match this specific structure.
Option Analysis:
Option A:
Twisted Pairs consist of two insulated wires twisted together, not a central conductor surrounded by a braided shield.
Option B:
Coaxial Cable consists of a central conductor wire surrounded by insulation and then a grounded shield of braided wire.
Option C:
Optical Fiber uses glass or plastic fibers to transmit data using light, not a central conductor surrounded by a braided shield.
Option D:
Wireless Technologies do not use cables and instead transmit data through the air using radio waves or other electromagnetic signals.
4.
What is a device that connects multiple computers together within a network?
A) Repeater.
B) Bridge.
C) Switch.
D) Router.
Show Answer
Correct Answer:
Correct answer is: (C) Switch.
Exam Relevance:
CCNA, CompTIA Network+, Network Fundamentals
Difficulty:
Easy
Concept notes:
A switch is a network device that connects multiple computers together within a network by forwarding data to the appropriate destination based on the MAC address.
Common Mistakes:
A common misunderstanding is that a router is the only device that can connect multiple computers, but a switch is specifically designed for this purpose within a local network.
Explanations:
A switch is a network device that connects multiple computers together within a local network. It operates at the data link layer (Layer 2) of the OSI model and uses MAC addresses to forward data to the correct destination. This makes it an ideal device for connecting multiple computers within a single network segment.
Option Analysis:
Option A:
A repeater is a simple device that amplifies and retransmits signals but does not connect multiple computers in a network.
Option B:
A bridge connects two network segments and operates at the data link layer, but it is not designed to connect multiple computers within a single network.
Option C:
A switch connects multiple computers within a network and operates at the data link layer, making it the correct choice.
Option D:
A router connects multiple networks and operates at the network layer (Layer 3), which is not the primary function for connecting multiple computers within a single network.
Mnemonic:
Switch = Switches Computers
5.
The computer(s) which provide services are called .....
A) Client.
B) Main Computer.
C) Server.
D) None of these.
Show Answer
Correct Answer:
Correct answer is: (C) Server.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
In a network, a server is a computer system that provides services to other computers, known as clients. Servers are designed to manage network resources and provide various services such as file storage, email, and web hosting.
Common Mistakes:
A common misunderstanding is that the term "main computer" refers to the server. However, "main computer" is not a standard term in networking and can be ambiguous.
Explanations:
The term "server" specifically refers to a computer that provides services to other computers in a network. Servers are designed to handle multiple client requests simultaneously and are optimized for performance and reliability.
Option Analysis:
Option A:
A client is a computer that requests and uses services from a server, not the other way around.
Option B:
"Main Computer" is not a standard term in networking and can be ambiguous. It does not specifically refer to a server.
Option C:
A server is the correct term for a computer that provides services to other computers in a network.
Option D:
This option is incorrect as the correct answer is provided by option C.
6.
What network device is used to connect two LAN's together that uses the same protocol?
A) Hub/Switch.
B) Router/Modem.
C) Bridge.
D) Server.
Show Answer
Correct Answer:
Correct answer is: (C) Bridge.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Moderate
Concept notes:
A bridge is a network device used to connect two LANs that use the same protocol.
Common Mistakes:
A common misunderstanding is that a router or switch is the correct answer. However, a router is used to connect different networks, and a switch is used to connect multiple devices within the same network.
Explanations:
A bridge operates at the data link layer (Layer 2) of the OSI model and is used to connect two LANs that use the same protocol. It filters and forwards data frames based on MAC addresses, improving network performance by reducing traffic and isolating segments of the network.
Option Analysis:
Option A:
A hub or switch is used to connect multiple devices within the same LAN, not to connect two separate LANs.
Option B:
A router is used to connect different networks, not two LANs using the same protocol. A modem is used to connect to the internet, not to connect LANs.
Option C:
A bridge is the correct device for connecting two LANs that use the same protocol.
Option D:
A server is used to provide services and resources to clients on a network, not to connect LANs.
Mnemonic:
Bridge = LANs Same Protocol
7.
Which of these components is internal to a computer and is required to connect the computer to a network?
A) Wireless Access Point.
B) Network Interface card.
C) Switch.
D) Hub.
Show Answer
Correct Answer:
Correct answer is: (B) Network Interface card.
Exam Relevance:
CCNA, CompTIA Network+, Network Fundamentals
Difficulty:
Easy
Concept notes:
A network interface card (NIC) is an internal component of a computer that enables it to connect to a network.
Common Mistakes:
A common mistake is to confuse external network devices like wireless access points, switches, and hubs with internal components.
Explanations:
A network interface card (NIC) is an internal hardware component that allows a computer to connect to a network. It is required for the computer to communicate with other devices on the network. The other options (Wireless Access Point, Switch, Hub) are external network devices and are not internal to the computer.
Option Analysis:
Option A:
A Wireless Access Point is an external device that provides wireless network access.
Option B:
A Network Interface Card is an internal component that connects the computer to a network.
Option C:
A Switch is an external device that connects multiple devices on a network.
Option D:
A Hub is an external device that connects multiple devices on a network.
Mnemonic:
NIC for Network Inside Computer
8.
Connects the source and destination directly
A) Hub.
B) Switch.
C) Server.
D) Sheared Resources.
Show Answer
Correct Answer:
Correct answer is: (B) Switch.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Moderate
Concept notes:
A switch is a network device that connects multiple devices on a network and forwards data packets to the correct destination based on the MAC address.
Common Mistakes:
A common misunderstanding is that a hub also connects devices directly, but a hub broadcasts data to all connected devices, whereas a switch forwards data only to the intended recipient.
Explanations:
A switch connects the source and destination directly by examining the destination MAC address of each data packet and forwarding it only to the appropriate port. This direct connection improves network efficiency and reduces congestion compared to a hub, which broadcasts data to all connected devices.
Option Analysis:
Option A:
A hub connects multiple devices but broadcasts data to all connected devices, not directly to the destination.
Option B:
A switch connects the source and destination directly by examining the destination MAC address and forwarding data only to the intended recipient.
Option C:
A server provides services and resources to clients but does not directly connect source and destination devices.
Option D:
Shared resources refer to network resources that can be accessed by multiple users but do not directly connect devices.
Mnemonic:
Switch = Smart Connect
9.
Which of the following cable types does NOT use copper wires?
A) Coax.
B) STP.
C) UTP.
D) Fiber-optic.
Show Answer
Correct Answer:
Correct answer is: (D) Fiber-optic.
Exam Relevance:
CCNA, CompTIA Network+, Network+ Essentials
Difficulty:
Easy
Concept notes:
Fiber-optic cables use glass or plastic fibers to transmit data, not copper wires.
Common Mistakes:
A common mistake is assuming all cables used in network devices are made of copper.
Explanations:
Fiber-optic cables transmit data using light pulses through glass or plastic fibers, whereas coaxial (Coax), shielded twisted pair (STP), and unshielded twisted pair (UTP) cables all use copper wires for data transmission.
Option Analysis:
Option A:
Coaxial cables use copper wires for data transmission.
Option B:
Shielded twisted pair cables use copper wires for data transmission.
Option C:
Unshielded twisted pair cables use copper wires for data transmission.
Option D:
Fiber-optic cables use glass or plastic fibers for data transmission, not copper wires.
10.
It refers to a device that modulated and demodulates signals transmitted over data communication facilities.
A) Facsimile machine.
B) Communication hub.
C) Modem.
D) Cellular phone.
Show Answer
Correct Answer:
Correct answer is: (C) Modem.
Exam Relevance:
CCNA, CompTIA Network+, CIW Network Specialist
Difficulty:
Easy
Concept notes:
A modem is a device that modulates and demodulates signals for data communication.
Common Mistakes:
A common misunderstanding is that a modem is only used for internet connections, but it is also used for other types of data communication.
Explanations:
A modem is specifically designed to modulate digital data into analog signals for transmission over analog communication lines and demodulate received analog signals back into digital data. This makes it the correct answer for a device that modulates and demodulates signals for data communication.
Option Analysis:
Option A:
A facsimile machine (fax) transmits scanned images over a telephone line but does not modulate and demodulate signals in the same way a modem does.
Option B:
A communication hub is a device that connects multiple network segments and does not perform modulation and demodulation.
Option C:
A modem is the correct answer as it modulates and demodulates signals for data communication.
Option D:
A cellular phone transmits voice and data over cellular networks but does not perform the specific function of modulating and demodulating signals for data communication in the same way a modem does.
Mnemonic:
Modem: Modulate, Demodulate
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Frequently Asked Questions
What is the role of a network switch in a local network?
A network switch forwards data packets between devices on a local network, improving efficiency by directing traffic to the intended recipient rather than broadcasting to all devices.
How does the OSI model help in understanding network devices?
The OSI model provides a framework for understanding how different network devices function at various layers, from physical connections to application-level services, aiding in troubleshooting and design.
What is the significance of a MAC address in data communication?
A MAC address uniquely identifies a device on a network, enabling data packets to be directed to the correct device, similar to how a street address directs mail to a specific house.
How does a network interface card (NIC) contribute to network connectivity?
A network interface card enables a device to connect to a network by providing the necessary hardware and software to communicate with other devices, facilitating data transmission and reception.
What is the difference between a client-server model and a direct connection?
In a client-server model, devices (clients) request services from a central server, while a direct connection involves devices communicating directly with each other without an intermediary server.