-- card: 109777 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 7720
-- name: #356
----- HyperTalk script -----
on openCard
  global group,rightone
  put 33 into group
  put "B" into rightone
  pass openCard
end openCard



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Question #33

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4BH-2B.3 The International Organization for Standardization has developed a seven-level reference model for a packet-radio communications structure.  What level arranges the bits into frames and controls data flow?

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The transport layer

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The link layer

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The communications layer

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The synchronization layer

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Correct answer is B