题目
A.Each device on the Ethernet segment stops transmitting for a short time.
B.A jam signal informs all devices that a collision occurred.
C.When data transmission resumes, the devices that were involved in the collision have priority to transmit.
D.The devices that are involved in the collision stops transmitting for a short time.
E.The collision invokes a random back-off algorithm.
第2题
Two nuclear power stations _______ in the past ten years.
A.are built
B.have been built
C.would be built
D.are building
第3题
A.The difference in designing underground subway stations can be clearly seen between these two approaches.
B.The design of these two underground subway stations clearly demonstrates the possible degree of variation.
C.You can clearly distinguish the difference between these two approaches to designing underground subway stations.
D.We can all see the difference between these two approaches to designing underground subway
第4题
A.The difference in designing underground subway stations can be clearly seen between these two approaches.
B.These two underground subway station designs clearly demonstrate the possible degree of variation.
C.You can clearly distinguish the difference between these two approaches to designing underground subway stations.
D.We can see the difference between these two approaches to designing underground subway stations cle
第5题
A.The difference in designing underground subway stations can be clearly seen between these two approaches.
B.The design of these two underground subway stations clearly demonstrates the possible degree of variation.
C.You can clearly distinguish the difference between these two approaches to designing underground subway stations.
D.We can all see the difference between these two approaches to designing underground subway
第6题
A.The difference in designing underground subway stations can be clearly seen between these two approaches.
B.The design of these two underground subway stations clearly demonstrates the possible degree of variation.
C.You can clearly distinguish the difference between these two approaches to designing underground subway stations.
D.We can all see the difference between these two approaches to designing underground subway
第7题
A. After a collision, the station that detected the collision has first priority to resend the lost data.
B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
C. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
D. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.
E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.
第8题
A.They must be conspicuously marked
B.They must be located at least 10 feet from the engine
C.There must be at least two such shutdown devices
D.The valve rods shall be fitted with stuffing boxes
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