Test on Introduction to Practical Computer Networking

Question 1: Multi-mode fiber is a type of fiber optic cable primarily used by ISPs for connections spanning up to 80 km.

A. Ano

B. Ne

Explanation: Multi-mode fiber (MMF) is a fiber type for short distances (up to 2 km). Single-mode fiber (SMF) is the fiber type for long distances (up to 80 km) and is used by ISPs.

Question 2: Based on the provided study materials, which UTP cable category is designed to support 10 Gbps speed over a distance of 100 meters, making it suitable for data centers and structured cabling?

A. Cat5e

B. Cat6

C. Cat6A

D. Cat7/Cat8

Explanation: The study materials indicate that Cat6A UTP cable supports a maximum speed of 10 Gbps over 100 meters and is commonly used in data centers and structured cabling. Cat5e supports 1 Gbps at 100m, Cat6 supports 10 Gbps at 55m (or 1 Gbps at 100m), and Cat7/Cat8 supports 25-40 Gbps over shorter runs.

Question 3: Fiber optic cables are less expensive than copper cables.

A. Ano

B. Ne

Explanation: The study materials list 'More expensive than copper' as a disadvantage of fiber optic cables.

Question 4: What is a primary advantage of using single-mode fiber (SMF) optic cables compared to multi-mode fiber (MMF) according to the study materials?

A. SMF supports much shorter distances for campus links.

B. SMF is typically used in data centers for short-range connections.

C. SMF offers a significantly longer maximum distance for ISP backbone links.

D. SMF is more immune to electromagnetic interference than MMF.

Explanation: The study materials state that Single-mode (SMF) fiber has a maximum distance of 10–80 km and is used for ISP backbone and campus links, while Multi-mode (MMF) has a maximum distance of 550 m–2 km and is used for data centers and server rooms. This indicates SMF offers a significantly longer maximum distance. Both fiber types are immune to electromagnetic interference compared to copper.

Question 5: Wi-Fi 6 (802.11ax) introduced support for the 6 GHz frequency band.

A. Ano

B. Ne

Explanation: The study materials show that 802.11ax (Wi-Fi 6/6E) supports 2.4 / 5 / 6 GHz, while the previous standard, 802.11ac (Wi-Fi 5), only supported 5 GHz. Therefore, Wi-Fi 6 introduced support for the 6 GHz band.