Below are the summary of prime 30 CCNA multiple choice questions and answers for skilled pdf and freshers novices. CCNA Multiple Choice Questions and Answers 1.When are link-state packets sent to neighbors? A.every 30 seconds B.every 180 seconds C.after the holddown time expires D.when a link goes up or down E.when a routing loop occurs ANS: D 2.Why is it difficult for routing loops to occur in networks that use link-state routing? A.Each router builds a simple view of the network based on hop count. B.Routers flood the network with LSAs to discover routing loops. C.Each router builds a complete and synchronized view of the network. D.Routers use hold-down timers to prevent routing loops. ANS: C 3.What two statements correctly describe the link state routing process? A.all routers in the area have link state databases B.each router in the area floods LSPs to all neighbors C.LSPs use the re...