# IS310 Exam 3 Make Up Quest

 TCP/IP model layers: Application layerTransport layerInternet layerNetwork Interface layerPhysical layer Open Systems Interconnection (OSI) model layers: Application layerPresentation layerSession layerTransport layer Network layerData Link layerPhysical layer Physical topologies: MeshBusRing Star Signal-to-noise (SN) ratio: S/N ratio = signal power - noise powerS/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, archivesEx. of lossless compression: audio and video data The difference between a cache and a buffer is: data isn't automatically removed as it is readcache are only used for storage device accessescache (but not buffer) content is intelligently managedcaches are usually much larger than buffersa cach is used for bidirectional data transfer Functions of device controller: Implement the bus interface and access protocolsTranslate logical access into physical accessesEnable 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 ratebus capacity = bits * MHzbytes 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 Authorttran1 ID118272 Card SetIS310 Exam 3 Make Up Quest DescriptionProbable Question for Exam 3 Updated2011-11-21T09:17:57Z Show Answers