多項選擇題Which of the following statements describe the characteristic of link state routing protocols?（）

A. The exchange of an advertisement is triggered by a change in the network.
B. All routers exchange routing tables with each other in a multipoint network.
C. Packets are routed based upon the shortest path to the destination.
D. Paths are chosen depending on the cost efficiency factor.
E. Every router in an OSPF area is capable of representing the entire network topology.
F. Only the designated router in an OSPF area can represent the entire network topology.


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2.多項選擇題Which of the following technologies can be used in distance vector routing protocols to prevent routing loops?（）

A. Spanning Tree Protocol
B. Shortest path first tree
C. Link-state advertisements (LSA)
D. Hold-down timers
E. Split horizon
F. VRP

5.多項選擇題Part of the job as a network administrator is being able to make a distinction between routed protocols and routing protocols. Which of the following statements is true regarding them?（）

A. A routing protocol is assigned to an interface and determines the method of packet delivery.
B. A routed protocol is assigned to an interface and determines the method of packet delivery.
C. A routing protocol determines the path of a packet through a network.
D. A routed protocol determines the path of a packet through a network.
E. A routing protocol operates at the transport layer of the OSI model.
F. A routed protocol updates the routing table of a router.