Under the 802.11 standard what spread spectrum technology allows for the highest number of co-located access points with the least interference?
Answer(s): A
According to the IEEE 802.11 standard, what is the RF spectrum bandwidth used by FHSS and DSSS?
Answer(s): D
The IEEE 802.11 standard specifies data rates of 1 Mbps and 2 Mbps and OpenAir (a standardcreated by the now defunct Wireless LAN Interoperability Forum) specifies data ratesof 800 kbps and 1.6 Mbps. In orderfor a frequency hopping system to be 802.11 or OpenAircompliant, it must operate in the 2.4 GHz ISM band (which is defined by the FCC as being from 2.4000 GHz to 2.5000 GHz). Both standards allow operation in the rangeof 2.4000 GHz to 2.4835 GHz.
CWNA Official Study Guide, Page 80
Which of the following is an omni-directional antenna?
Answer(s): B
The most common wireless LAN antenna is the Dipole antenna. Simple to design, the dipoleantenna is standard equipment on most access points. The dipole is an omnidirectional antenna, because it radiates its energy equally in all directions around its axis. Directional antennas concentrate their energy into a cone, known as a "beam."
CWNA Official Study Guide, Page 134
Wireless LAN client utility software includes what monitoring function?
Link status monitor utilities allow the user to view packet errors, successful transmissions, connection speed, link viability, and many other valuable parameters. There is usually a utility for doing real-time link connectivity tests so that, for example, anadministrator would be able to see how stable a wireless link is while in the presence ofheavy RF interference or signal blockage.
CWNA Official Study Guide, Page 119
The Wi-Fi Alliance certifies products compatible with which standards?
The Wireless Fidelity (a.k.A. Wi-Fi) seal indicates that a vendor's hardware has undergoneextensive testing to assure interoperability with other devices manufacturedto meet the 802.11b standard. In orderto be interoperable with other 802.11b equipment, the equipment under test would most likely have to meet the same802.11b standards.
CWNA Official Study Guide, Page 193
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