OSI参考模型

UID: 105068 · 发表于 2012-3-7 21:42:25

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Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two.)
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.
Answer: AD
谁会帮忙解释下各个答案对与错的原因

UID: 108413 · 发表于 2012-3-7 23:57:47

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UID: 105068 · 发表于 2012-3-8 10:31:13

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UID: 105068 · 发表于 2012-3-8 10:32:35

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UID: 79359 · 发表于 2012-3-8 12:56:34

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[已解决] OSI参考模型

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