Which one of the following statements

Which one of the following statements best explains the split horizon rule used in distance vector routing protocols?（）

A Only routers can split boundaries (horizons) between concentric networks.
B Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.
C Networks can only remain fully converged if all information is sent out all active interfaces.
D Information about a route should not be sent back in the direction from which the original update came.
E Distance vector protocols need fall back routers that are responsible for momentary loops.

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分类：CCNA(640-801)题库

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