INFO 620 - Final Exam Study Guide SOLUTIONS GRADE A+ GUARANTEED
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INFO 620 - Final Exam Study Guide
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INFO 620 - Final Exam Study Guide
________ are the end-system devices that run applications
Wireless Hosts
________ networks operate in the unlicensed spectrum
802.11
___________ is responsible for sending and receiving data (e.g. packets) to and from a wireless host
Base Station
_______ in cellular networks and _________ i...
INFO 620 - Final Exam Study Guide
SOLUTIONS GRADE A+ GUARANTEED
________ are the end-system devices that run applications
Wireless Hosts
________ networks operate in the unlicensed spectrum
802.11
___________ is responsible for sending and receiving data (e.g.
packets) to and from a wireless host
Base Station
_______ in cellular networks and _________ in 802.11 wireless LANs
are examples of base stations
Cell Towers, Access Points
When a mobile host moves beyond the range of one base station and
into the range of another, it will change its point of attachment, a
process referred to as _____________
Handoff
A Single - Hop, infrastructure - based is _________
A base station that is connected to a larger wired network
A Multi - Hop, infrastructure - based are so called _______
Wireless Mesh Networks
The three differences between wireless and wired networks are that
wireless can have these kinds of problems:____________ ,
________________ , _____________.
Decreasing Signal Strength, Interference, Multi - Path Propagation
If we have high ___________ then more data will get sent
SNR
If we have high ________ then we need a higher _______ to get more
data sent
BER, SNR
A microwave over is considered _______ in the 2.4 GigHz Wifi
frequency
Noise
What will allow for more data throughput? A high _______
SNR
With SNR we boost the _________ to avoid BER
Signal
10 to the -7th power is a good _______ number amount because it is a
small number
BER
, The hidden terminal problem refers to _____________
Two APs not seeing each other and colliding with transmissions at the
same time
A Chippinga is used to _______
Multiplex multiple users traffic
Demultiplexing by two users is done by each user's applying their
"chipping rate" __________ to the combined received signal
Code
The ___________ encodes the user data with a _________ rate
Chipping Rate, Fewer
A "Chipping Rate" code is used by the __________ lower layer protocol
CDMA
The Wifi Standard is __________
802.11
The protocol used for Wifi is ____________
CSMA/CA
To avoid collisions the ___________ Protocol uses __________ and
________ wait periods
CSMA/CA, DIFS, SIFS
_______ interval ensures that all is clear on the channel
DIFS
______ interval ensures that when CRC passing frame is reached it
waits before sending an ACK
SIFS
Current Campus Wifi architecture uses ____________ for central
management of the network
Controllers
Perhaps the most important characteristic of video is its ___________
High Bit Rate
VoIP (Voice) traffic is "loss tolerant" but "______ sensitive"
Delay
There are two types of compression redundancy in video: ________ ,
________
Spatial, Temporal
Each of the Audio samples is then rounded to one of a finite number
of values is referred to as _________
Quanitzation
By increasing the _______ and the number of quantization values, the
decoded signal can better approximate the original analog signal
Sampling Rate
Speech encoding often uses _______ , with a sampling rate of 8,000
samples per second and 8 bits per sample, resulting in a rate of 64
kbps
Pulse Code Modulation
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