Link state routing protocols have which of the following characteristics? A. They use hop count as a metric to determine routes. B. They use multiple metrics to determine routes. C. They exchange routing information only with their directly connected neighbor routers. D. They exchange routing information directly from other routers throughout the network. Solution B and D are correct. B is correct because link state protocols use multiple metrics in determining and ranking routes. D is correct because LSAs are sent directly to all routers within the network, not just to directly connected neighbor routers. A and C are incorrect. A is incorrect because link state protocols do not use hop count as a metric to determine routes. C is incorrect because link state protocols exchange routing information only with all routers running the protocol..