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多項(xiàng)選擇題

What information does a router running a link-state protocol use to build and maintain its topological database?()

A. hello packets
B. SAP messages sent by other routers
C. LSAs from other routers
D. beacons received on point-to-point links
E. routing tables received from other link-state routers
F. TTL packets from designated routers

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