Unit 8

Which device operates at Layer 1 (Physical) of the OSI model and regenerates network signals?

• Router

• Switch

• Hub

• Modem

Answer explanation

A hub operates at Layer 1 (Physical) of the OSI model and is responsible for regenerating and amplifying network signals to extend the distance over which data can travel.

What is the primary function of a network interface card (NIC)?

• To manage IP addresses.

• To enable a device to connect to a network.

• To route network traffic.

• To filter network packets.

Answer explanation

The primary function of a network interface card (NIC) is to enable a device to connect to a network, allowing it to communicate with other devices. This is essential for data transmission and network access.

Which connector is commonly used for twisted-pair Ethernet cables?

• BNC

• RJ-11

• RJ-45

• USB Type-C

Answer explanation

The RJ-45 connector is specifically designed for twisted-pair Ethernet cables, making it the standard choice for networking. Other options like BNC and RJ-11 are used for different types of connections.

What type of cable is used for long-distance, high-bandwidth network connections?

• Coaxial cable

• Twisted-pair cable

• Fiber optic cable

• Serial cable

Answer explanation

Fiber optic cable is ideal for long-distance, high-bandwidth connections due to its ability to transmit data as light signals, which reduces signal loss and allows for higher speeds compared to coaxial or twisted-pair cables.

Which device connects multiple network segments and forwards data based on MAC addresses?

• Router

• Hub

• Switch

• Modem

Answer explanation

A switch connects multiple network segments and forwards data based on MAC addresses, making it the correct choice. In contrast, routers operate at the IP level, hubs transmit data to all ports, and modems connect to the internet.

What is the purpose of an access point (AP) in a wireless network?

• To route traffic between networks.

• To provide wireless connectivity to devices.

• To manage IP addresses.

• To filter network packets.

Answer explanation

The primary purpose of an access point (AP) is to provide wireless connectivity to devices, allowing them to connect to a wired network without physical cables.

Which device converts digital signals from a computer into analog signals for transmission over telephone lines?

• Router

• Switch

• Hub

• Modem

Answer explanation

A modem is the device that converts digital signals from a computer into analog signals, allowing for transmission over telephone lines. This is essential for connecting to the internet via traditional phone lines.

What is the function of a patch panel in a network wiring closet?

• To amplify network signals.

• To provide a central point for terminating network cables.

• To route network traffic.

• To filter network packets.

Answer explanation

A patch panel serves as a central point for terminating network cables, allowing for organized management and easy access to connections. This makes it essential for efficient network setup and maintenance.

Which device is used to terminate fiber optic cables?

• RJ-45 coupler

• ST/SC/LC connector

• BNC terminator

• Serial adapter

Answer explanation

The ST/SC/LC connectors are specifically designed to terminate fiber optic cables, providing a secure connection. Other options like RJ-45 and BNC are used for different types of cables, not fiber optics.

What is the purpose of a repeater?

• To route network traffic.

• To extend the range of a network signal.

• To filter network packets.

• To manage IP addresses.

Answer explanation

A repeater is used to extend the range of a network signal by amplifying and retransmitting it, allowing for greater distances between devices without loss of signal quality.