2.7 CQ

Question 1

Which of the following is a group of Windows desktop computers located in a small area?

A. LAN

B. WAN

C. PAN

D. MAN

Answer 1

A. A local area network (LAN) is a group of computers, such as a SOHO network located in a small area. A wide area network (WAN) is a group of one or more LANs spread over a larger geographic area. A personal area network (PAN) is a smaller computer network used by smartphones and other small computing devices. A metropolitan area network (MAN) is a group of LANs in a smaller geographic area of a city.

Question 2

Which Internet service makes use of PSTN?

A. Dial-up

B. ISDN

C. DSL

D. Cable Internet

Answer 2

A. Dial-up Internet connections make use of the public switched telephone network (PSTN) and POTS phone lines. ISDN was developed to meet the limitations of PSTN. DSL provides faster data transmissions over phone lines (or separate data lines). Cable Internet is a broadband service that offers higher speeds than DSL; it is provided by cable TV companies.

Question 3

You have been tasked with setting up a small office with the fastest Internet service possible. There is no fiber optic availability in the area because of the rocky, hilly terrain. Which Internet service will typically offer the best data transfer rates?

A. WMN

B. FTTP

C. DSL

D. Cable Internet

E. Fixed wireless

Answer 3

D. The Internet service with the best data transfer rates will typically be cable Internet. Cable Internet service is generally “faster” than DSL. WMN stands for wireless mesh network, a type of network that uses multiple access points—but it is not an Internet service. FTTP stands for fiber to the premises, which is not available in the scenario. Fixed wireless (or line-of-sight wireless Internet service) can offer very high data transfer rates, but it requires an unobstructed view of the provider’s tower. This is probably not an option due to the rocky, hilly area where the customer’s office resides.