CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

2.8. Answers

1. B. Printers from different manufacturers support some of or all the listed wireless technologies, and WWAN is a technology used to connect to your network while out of the office. See "Understanding Infrared Devices", "Bluetooth", and "Working with Wireless Networks".

2. A, C. Bluetooth technology has ranges of 1, 10, and 100 meters depending on the class of devices that are being used. Review "Bluetooth".

3. B. Most 802.11 wireless networks have a range of 30 meters in open air. Check out "Wireless standards".

4. B. Air temperature has not been documented to have an impact on wireless networks. Peruse "Troubleshooting Issues".

5. B. 802.11g uses the same 2.4 GHz spectrum and was designed to be backward compatible with 802.11b. 802.11n is expected to be backward compatible with both 802.11g and 802.11b. Take a look at "802.11g".

6. C. The only technology that will work across a metropolitan area is cellular, which is used for WAN cellular or WWAN connectivity. Peek at "WAN cellular".

7. C, D. 802.11 networks run at either 2.4 GHz for 802.11b/g/n or 5.0 GHz for 802.11a. Look over "Wireless standards".

8. A. WPS is not a technology used for wireless security. Study "Securing wireless networks".