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IS310 Exam 3 Make Up Quest
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TCP/IP model layers:
Application layer
Transport layer
Internet layer
Network Interface layer
Physical layer
Open Systems Interconnection (OSI) model layers:
Application layer
Presentation layer
Session layer
Transport layer
Network layer
Data Link layer
Physical layer
Physical topologies:
Mesh
Bus
Ring
Star
Signal-to-noise (SN) ratio:
S/N ratio = signal power - noise power
S/N ratio = (initial signal power - attenuation) - (initial noise power + added noise)
Formula for solving getting bandwidth:
Bandwidth = Maxfreq - Minfreq
Problem with Speech Recognition programs:
Formula to figure out how many byte in a resolution display:
___________ = ____
___pixel*____pixel * 3 byte = ____byte
Ex. of lossy compression:
Ex. of lossless compression:
Ex. of lossy compression
:
zip files, archives
Ex. of lossless compression
:
audio and video data
The difference between a cache and a buffer is:
data isn't automatically removed as it is read
cache are only used for storage device accesses
cache (but not buffer) content is intelligently managed
caches are usually much larger than buffers
a cach is used for bidirectional data transfer
Functions of device controller:
Implement the bus interface and access protocols
Translate logical access into physical accesses
Enable several devices to share access to a bus connection
Formula for bus cycle time:
bus cycle time = 1/ (bus clock rate * 1,000,000)
Formula for bus capacity:
bus capacity = data transfer unit * clock rate
bus capacity = bits * MHz
bytes per second = (bits/2= byte) * (MHz*1,000,000)
Formula for average access delay:
average access delay = HTH switch + TTT seek + rotational delay
formula for average access time:
average access time = average access delay + ( (time/rpm) /sectorpertrack)
formula for sustained data transfer rate:
1/time * bytes per sector = KB per second
formula for max data transfer rate:
1/time * bytes per sector = MB per second
formula for data transfer rate:
(1/ns * bits) * byte= bytes/second
Author
ttran1
ID
118272
Card Set
IS310 Exam 3 Make Up Quest
Description
Probable Question for Exam 3
Updated
2011-11-21T09:17:57Z
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