Quiz: Fundamentals of Computer Networking — 12 domande

1. Which network medium transmits data over radio waves through the air?

A. Twisted-pair cable

B. Coaxial cable

C. WLAN / WiFi

D. Fiber optic cable

Answer: (C)

Spiegazione

WLAN / WiFi is a wireless medium that sends data using radio waves. Twisted-pair, coaxial cable, and fiber optic cable are wired media.

2. Which statement best describes fiber optic cable as a network medium?

A. It transports data as light through glass or plastic fibers

B. It depends on radio waves to connect devices

C. It uses unshielded copper pairs for short distances

D. It carries electrical signals on copper conductors

Answer: (A)

Spiegazione

Fiber optic cable is a wired medium that carries optical signals as light. Radio waves describe wireless media, not fiber.

3. What is the main difference between a Permanent Link and a Channel Link in structured Ethernet cabling?

A. The Channel Link includes the fixed cabling plus patch leads, while the Permanent Link is only the fixed installation

B. The Channel Link is limited to 90 m, while the Permanent Link can reach 100 m

C. The Permanent Link is a wireless path, while the Channel Link is a copper cable

D. The Permanent Link includes patch leads, while the Channel Link does not

Answer: (A)

Spiegazione

A Permanent Link is the fixed installation part, while a Channel Link includes the fixed cabling and patch leads. That is why the Channel Link has the larger total length limit.

4. What does the abbreviation UTP mean in Ethernet cabling?

A. Ultra-thin protected cable

B. Universal transmission path

C. Unshielded twisted pair

D. Unified terminal port

Answer: (C)

Spiegazione

UTP stands for unshielded twisted pair, meaning the cable uses twisted copper pairs without shielding. The other options do not match the cabling standard abbreviation.

5. What does a CAT rating in copper data cabling describe?

A. The number of devices that can share the cable

B. The physical length of the installation

C. The performance class such as bandwidth and signal quality

D. The color code of the cable jacket

Answer: (C)

Spiegazione

A CAT category such as CAT5e or CAT6 is a performance rating that indicates properties like bandwidth and signal quality. It is not a length or device-count label.

6. Which cable type is generally used to carry Ethernet signals over twisted copper conductors?

A. Single-mode fiber patch cable

B. Copper data cable

C. Power cable

D. Radio link

Answer: (B)

Spiegazione

A copper data cable is designed to carry Ethernet signals over twisted copper conductors. Fiber uses light, and radio links use wireless transmission.

7. Why does a star topology often have lower availability when the central switch fails?

A. Because every device is connected only through the central point

B. Because each device has a direct backup link to the internet

C. Because wireless interference interrupts every cable at once

D. Because communication requires a closed loop

Answer: (A)

Spiegazione

In a star topology, many connections converge on one central switch or core device, so that device becomes a single point of failure. A ring topology depends on a loop instead.

8. What is a common drawback of ring topologies?

A. They create a direct single point of failure at each endpoint

B. They are harder to scale and troubleshoot

C. They require radio waves instead of cables

D. They eliminate the need for any switching device

Answer: (B)

Spiegazione

Ring designs can be harder to expand and diagnose because behavior depends on the loop structure. The single point of failure issue is more characteristic of a central star device.

9. Which structured cabling level connects the building’s main distribution area to lower distribution points?

A. Patch cabling

B. Tertiary cabling

C. Secondary cabling

D. Primary cabling

Answer: (D)

Spiegazione

Primary cabling is the segment from the main distribution area to lower distribution points. Secondary cabling and tertiary cabling serve lower levels closer to outlets and end devices.

10. Which building components are associated with structured cabling organization in the building and on the floor?

A. CAT and UTP

B. EV and GV

C. WLAN and router

D. LAN and WAN

Answer: (B)

Spiegazione

EV and GV are the floor distributor and building distributor components used to organize structured cabling levels. The other pairs are not building distributor components.

11. What is a computer network?

A. A private cable type used for Ethernet only

B. A single computer with multiple user accounts

C. A wireless standard for internet access

D. A set of connections between independent computers that enables data exchange

Answer: (D)

Spiegazione

A computer network consists of connections between independent computers of different types that allow data exchange. The other options describe a device, a cable, or a wireless standard.

12. Which service is commonly provided by networks for automatic IP address assignment?

A. FTP

B. SMTP

C. DNS

D. DHCP

Answer: (D)

Spiegazione

DHCP is the service used to assign IP addresses automatically to devices on a network. DNS resolves names, while FTP and SMTP are different data services.