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Material Type: Quiz; Class: Computer Net Interoperability; Subject: Computer Engr & Computer Sci; University: California State University - Long Beach; Term: Unknown 1989;
Typology: Quizzes
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1. (2 points each) Identify the following words with the phrase that most fully describes them: ____ link A. intermediate computers connected by physical medium ____ bandwidth B. measured performance of a channel ____ latency C. amount of “extra” information that must be sent ____ half duplex D. end-to-end delay of a bit ____ asynchronous E. processing a job on the least busy machine ____ host F. the physical medium connecting computers ____ throughput G. number of changes in the signal per second ____ overhead H. a node running a user application program ____ multiple access I. number of bits transmitted in a given period of time ____ baud rate J. requires no coordination between sender and receiver K. two links share a single physical medium L. information is sent only one direction at a time 2. (2 points) ping and traceroute could be used to show all of the following except: (a) Correlations in delay and hops across the Internet. (b) The average number of hops to a host. (c) The average delay to a host. (d) The cause of a link failure on the Internet. (e) The optimum packet size across the Internet. (f) None of the above. 3. (2 points) The factors which impact the effects of attenuation and distortion on twisted pair lines include: (a) The bit rate of the data being transmitted. (b) The type of twisted pair wire being used. (c) The type of transmitters and receivers being used. (d) The distance between the transmitting devices. (e) All of the above. 4. (2 points each) Identify the following types of transmission media with the phrase that most closely relates to it:
____ GEO Satellite A. period of rotation is ~1.5 hours ____ Copper Wire B. both ThickNet and ThinNet ____ Radio C. cannot penetrate snow, fog, etc. ____ Satellite Arrays D. good for security ____ Coaxial Cable E. higher frequency range than used for TV and radio ____ Optical Fiber F. used for TV remote controls ____ LEO Satellite G. uses different frequencies within cells ____ Infrared H. requires 66 satellites to cover the entire earth ____ Laser I. has no propagation delay ____ Microwave J. synchronized with the earth’s rotation K. suffers from “skin effect” L. has no attenuation
5. (2 points) When considering header overhead and sending large amounts of data , the following generalization can be made: (a) Circuit switching has less overhead than packet switching. (b) Packet switching has less overhead than circuit switching. (c) No generalization can be made. 6. (2 points) All of the following are true for RS-232 except: (a) Asynchronous. (b) Uses copper wire. (c) Limited to ~50 feet. (d) Eliminates framing errors. (e) None of the above.