Тест: Understanding Network Components and Devices — 8 въпроса

1. In a scenario where a network requires efficient data traffic management to prevent congestion, which device should be applied to connect multiple LAN segments?

A. Use a hub to broadcast all data to connected devices

B. Implement a switch to forward frames only to specific devices

C. Insert a router to direct data between different networks

D. Employ a repeater to regenerate signals across segments

Answer: (B)

Обяснение

A switch forwards frames only to the specific device they are intended for, based on MAC addresses, which reduces unnecessary traffic and congestion within LAN segments. Hubs broadcast data to all devices, which can lead to congestion. Repeaters simply regenerate signals and do not manage traffic, and routers are used for inter-network communication, not within LAN segments.

2. What is the primary function of a network switch?

A. To connect multiple devices within a LAN and forward data efficiently.

B. To connect different networks and direct traffic between them.

C. To amplify signals in a network to extend transmission distance.

D. To serve as a wireless access point for mobile devices.

Answer: (A)

Обяснение

A switch connects devices in a LAN and forwards data only to the intended recipient port, which improves efficiency. Routers, not switches, connect different networks. Repeaters amplify signals, and access points provide wireless connectivity.

3. What is the primary function of a network switch?

A. Amplifies signals to extend transmission distance

B. Filters traffic based on MAC addresses to improve efficiency

C. Broadcasts incoming data to all connected devices

D. Routes packets based on IP addresses for inter-network communication

Answer: (B)

Обяснение

The source states that switches 'utilize MAC address tables to enable selective forwarding, ensuring frames are sent only to the appropriate ports,' which describes their primary function of filtering traffic based on MAC addresses to improve network efficiency.

4. Which transmission media type is known for using physical copper cables with shielding to reduce interference?

A. Unshielded Twisted Pair (UTP)

B. Fiber Optic Cable

C. Shielded Twisted Pair (STP)

D. Wireless Radio Waves

Answer: (C)

Обяснение

Shielded Twisted Pair (STP) cables include shielding around the twisted pairs to reduce electromagnetic interference, making them suitable for environments with high interference. UTP lacks shielding, and fiber optic cables use light instead of electrical signals.

5. In what year was the Ethernet standard, commonly associated with RJ45 connectors, first introduced by Xerox PARC?

A. 1973

B. 1983

C. 1990

D. 2000

Answer: (A)

Обяснение

The Ethernet standard was first developed in 1973 at Xerox PARC, laying the foundation for modern LAN networking. RJ45 connectors became associated with Ethernet cabling standards in later years.

6. What is the role of a router in a network?

A. To connect different networks and facilitate traffic routing between them.

B. To connect multiple devices within the same LAN.

C. To amplify signals over long distances.

D. To convert digital signals into wireless signals.

Answer: (A)

Обяснение

Routers connect different networks and determine the best path for data to reach its destination, essential for internet connectivity. Switches connect devices within a LAN, not routers.

7. Which network component is responsible for managing network resources, security, and protocol enforcement?

A. Network Operating System (NOS)

B. Transmission media

C. Interconnection equipment

D. Terminal equipment

Answer: (A)

Обяснение

The Network Operating System (NOS) manages network resources, security, and communication protocols, unlike transmission media or hardware components.

8. What distinguishes a hub from a switch in network interconnection devices?

A. A hub forwards data to all connected devices, whereas a switch forwards data only to the targeted device.

B. A hub is wireless, while a switch is wired.

C. A hub is used in WANs, and a switch only in LANs.

D. A hub encrypts data, the switch does not.

Answer: (A)

Обяснение

Hubs broadcast incoming data to all ports, which can cause inefficiency, while switches intelligently forward data only to the intended recipient, improving network performance.