求助，哪位大侠帮忙下，813 题库关于FIB问题

allencheng

QUESTION 104
Which statement is true about the Forward Information Base (FIB) table?
A. The FIB is derived from the IP routing table and is optimized for maximum lookup throughput.
B. The FIB table is derived from the Address Resolution Protocol table, and it contains Layer 2 rewrite
(MAC) information for the next hop.
C. When the FIB table is full, a wildcard entry redirects traffic to the Layer 3 engine.
D. The FIB lookup is based on the Layer 2 destination MAC address.
E. None of the other alternatives apply
Answer: A

请问答案C为什么不对？当FIB表full, 接下来发生什么？

谢谢

allencheng

查了点资料，是邻接表满了，才指向3层好像。不知道对不对？请指教！

xiaonengjin

FIB表满了后，分组会被立刻发送给第三层引擎做进一步处理。
C选项里应该是wildcard entry表述有问题。