62. Which type of network is used for short-range communications, usually within a few feet?
Answer: A
Personal area network (PAN) is used for short-range communications.
A personal area network (PAN) is specifically designed for short-range communications, typically within a few feet. This type of network is commonly used for connecting personal devices such as smartphones, tablets, and laptops.
A) Personal area network (PAN)
This option is correct because a personal area network is explicitly defined for short-range communication, usually within a range of about 10 meters or 30 feet. It is used for scenarios like connecting a smartphone to a wireless headset or a laptop to a printer.
B) Local area network (LAN)
A local area network (LAN) covers a larger geographical area than a PAN, typically serving a building or campus. While it facilitates communication between devices, its range extends well beyond just a few feet, making it unsuitable for the short-range requirement specified in the question.
C) Extended area network (EAN)
An extended area network (EAN) is designed to connect multiple LANs over a broader area, such as a city or region. This type of network significantly exceeds the short-range communication defined by the question, hence it is not applicable.
D) Wide area network (WAN)
A wide area network (WAN) spans large geographical distances, connecting multiple LANs and EANs across cities, countries, or even continents. Its extensive range makes it the least suitable option for short-range communications, as it is intended for long-distance networking.
Conclusion
The personal area network (PAN) is the definitive answer as it directly aligns with the question's requirement for short-range communication. In contrast, all other options (LAN, EAN, and WAN) pertain to broader networking concepts that exceed the specified short distance, making them incorrect for this query.