Chapter 12 802.11 Standards Flashcards
WLANs typically operate on what duplex
Half
Wireless LANs use RF radiated into the air from?
Antenna that creates radio waves
By using higher frequencies, we can attain higher data rates, but this is unfortunately a cost of
Decreased transmitting distances
If we lower our antenna frequencies, what will be the payout?
Greater distance but lower rates of data
802 11 specifications was developed for what reason
Freedom and no licensing requirement in most countries
What organization regulates WLAN
Federal communication commission FCC
What organization creates standard base for different frequencies
Institute of electrical and electronics engineers
The FCC has released three unlicensed bands for public use. What are they?
900 MHz 2.4 GHz 5 GHz
What bands do we refer the 900 MHz and 2.4 GHz
Industrial scientific and medical bands, ISM
What bands do we refer the 5 GHz band?
The unlicensed national information infrastructure U-NII band
What organization grants certification for interoperability among 802.11 products offered by various vendors
Wi-Fi alliance
Global system for mobile communication contains what and doesn’t function without it?
Subscriber identity, module chip
What can be a danger to a GSM SIM chip?
Cloning the chip to take identity and make calls.
Frequency division multiple access FDMA are what?
modulation techniques for cellular wireless.
FDMA has what function according to what generation
It divides frequency range into bands and assign those bands to each subscriber for the first generation network.
