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举一反三
【多选题】Which of the following correctly describe steps in the OSI data encapsulation process?（）
A.
Transport layer divides a data stream into segments & adds reliability & flow control information
B.
Data link layer adds physical source & destination address & an FCS to the segment
C.
Packets are created when the network layer encapsulate a frame with source & destination host address& protocol related control information
D.
Packets are created when the network layers adds layers 3 address & control information to a segment
E.
The presentation layer translated bits into bits into voltages for transmission across the physical link
【简答题】排列与组合的概念有什么共同点吗?有什么不同点?
【单选题】When drawing multilevel data flow chart of top-down，the balance between parent chartand son chart must be taken into account，and to pass iudgment for the balance of the charts isregulaly maintained by...
A.
Output data
B.
Data dictionary
C.
Processing number
D.
Input data
【多选题】Which of the following correctly describe steps in the OSI data encapsulation process?（）
A.
The transport layer divides a data stream into segments and may add reliability and flow control information.
B.
The data link layer adds physical source and destination addresses and an FCS to the segment.
C.
Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D.
Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E.
The presentation layer translates bits into voltages for transmission across the physical link.
【简答题】A. Difficultyof changing one’s immigration status. B. Extent of error in card completion. C. Classification of border-crossers. D. Uncertainty in categorization. E. Computer-assi...
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