OMIS 660 Final Exam UPDATED ACTUAL Questions and CORRECT Answers
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Course
OMIS 660
Institution
OMIS 660
OMIS 660 Final Exam UPDATED
ACTUAL Questions and CORRECT
Answers
Wireless 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 ANSWE...
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
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