Related Questions

Ethernet and Token-Ring are the two most commonly used network architectures in the world. Jim has heard of the different topologies for networks and wants to choose the architecture that will provide him with the most options. Which of the following would that be? Choose the most correct answer.
A Token-Ring because it currently can run at both 4Mbps and 16Mbps. This means that it can be used in any topology
B Ethernet, because it is cabled using fiber-optic cable
C Token-Ring, because it uses a MAU
D Ethernet, because it can be set up with most topologies and can use multiple transfer speeds
E Neither Token-Ring nor Ethernet is the proper choice. Only ARCnet can be used in all topologies
Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologies.
A 12
B 81
C 48
D 729
E ARP.EXE
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.
A Network collisions occur
B Repeaters cannot increase the signal strength sufficiently
C Cable terminators do not reflect the signal properly
D Cable terminators do not absorb the signal properly
E "Line echo" occurs due to the impedance of the cable
The topology with highest reliability is:
A Bus topology
B Star topology
C Ring topology
D Mesh topology
Which of the following circuit breakers has high reliability and minimum maintenance ?
A Air blast circuit breakers
B Circuit breaker with SF6 gas
C Vacuum circuit breakers
D Oil circuit breakers
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
A Send a different source port number
B Restart the virtual circuit
C Decrease the sequence number
D Decrease the window size
The validity and reliability of a research will be at stake when
A The incident was reported after a long period of time from that of its occurrence
B The author who is the source of information is biased, incompetent or dishonest
C The researcher himself is not competent enough to draw logical conclusions
D All of the above
The reliability life cycle of a product:
A has three distinct rates of failure
B cannot be predicted
C All of the above
D stays constant with environmental conditions
E None of the above
When obligation is not probable or the amount expected to be paid to settle the liability cannot be measured with sufficient reliability, it is called
A Contingent liability
B Provision
C Secured loan
D None of the above
The highest grade of coal whose surface is shining and has the highest calorific value, is ________
A Anthracite
B Bituminous
C Lignite
D Peat

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