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OMIS 660 Final Exam questions with complete solutions
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OMIS 660 Final Exam questions with complete solutions
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OMIS 660 Final ExamWireless network standards operate at ______? - correct answer ✔✔The data link layer
Wireless network standards are ________ standards. - correct answer ✔✔OSI
Wi-Fi Standards come from the ________ Working Group. - correct answer ✔✔802.11
We use the terms Wi-Fi and ________ interchangeably in this book. - correct answer ✔✔802.11
Wireless access points typically link wireless clients to ________. - correct answer ✔✔Servers on the
wired network.
Compared to wired transmission, propagation problems in radio transmission are __________. - correct
answer ✔✔Worse
Wireless radio transmission speed is usually measured in terms of __________. - correct answer
✔✔Frequency
Frequency is measured in terms of ________. - correct answer ✔✔Hertz
Radio transmission is measured in terms of _________. - correct answer ✔✔Frequency (Check)
The other wireless device is far away in a known direction. It would be better to use __________. -
correct answer ✔✔Dish Antenna
A cellular telephone uses a(n) ________. - correct answer ✔✔Omni-directional Antenna
,At 10 meters, a signal has a strength of 100 mW. About how strong will it be at 40 meters? - correct
answer ✔✔Review Page 216
What propagation problem is especially bad in moist air? - correct answer ✔✔Absorptive Attenuation
What propagation problem becomes worse as there is a large dense object between the sender and
receiver? - correct answer ✔✔Shadow Zones
What propagation problem becomes worse as frequency increases? - correct answer ✔✔Neither inverse
square law attenuation, NOR electromagnetic interference
Correct is Absorptive Attenuation and Dead (Shadow) Zone
The frequency spectrum extends ________. - correct answer ✔✔To Infinity
The most serious problem with wireless transmission in WLANs is _________. - correct answer
✔✔Multipath Interference
2.4 GHz and 5 GHz are _______. - correct answer ✔✔Service Bands (CHECK)
To handle multiple conversations in radio transmission, you normally use multiple ________. - correct
answer ✔✔Channels
Signals in a transmission usually __________. - correct answer ✔✔Spread over a range of frequencies
A channel extends from 55 MHz to 60 MHz. Its bandwidth is __________. - correct answer ✔✔None of
the answers listed ....
Correct is 5 MHz.
, To transmit very rapidly in RADIO, you need ___________. - correct answer ✔✔Wide Bandwidth
Channels with wide bandwidths are called _________ channels. - correct answer ✔✔Broadband
802.11 standards are being developed to work in the _________ unlicensed band. - correct answer
✔✔Both 2.4 GHz and 5 GHz (CHECK)
To transmit data very rapidly, you would want a _________ channel. - correct answer ✔✔Broadband
The 2.4 GHz band supports ________ possible non-overlapping 20 MHz channel(s). - correct answer
✔✔3
Companies are moving to the 5 GHz band because there is _________ than in the 2.5 GHz band. - correct
answer ✔✔More bandwidth
The 5 GHz band usually supports about _______ non-overlapping 20 MHz channel(s). - correct answer
✔✔12
Spread spectrum transmission is used in WLANs because ___________. - correct answer ✔✔It is
required by regulators.
Keep in mind stronger security is NOT a benefit
Spread spectrum transmission is used in WLANs for __________. - correct answer ✔✔More reliable
transmission
WLANs normally use ___________. - correct answer ✔✔Unlicensed Bands
In unlicensed bands, ___________. - correct answer ✔✔You can use radios wherever you please
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