... and timing?A.PMDB.MACC.PHYD.SMTE.PASAnswer A incorrect because PMD defines cables, power, and optical components. AnswerB is incorrect because MAC defines media access. Answer C ... 83Chapter 4 • Token-Ring and FDDI8411.Under normal circumstances in an FDDI environment, which rings carry usertraffic?A.The first one to activateB.PrimaryC.SecondaryD.Options A and BE.Options ... CF.Options A, B, and CAnswer B is correct. Answer C is incorrect because the secondary ring carries user trafficonly when the ring is wrapped.12.When a failure occurs in an FDDI network,...