题库47问题
本帖最后由 tim_hk 于 2019-9-16 20:42 编辑Which three circumstances can cause a GRE tunnel to be in an up/down state? Choose three.
[*] The tunnel interface IP address is misconfigured.
[*] The tunnel interface is down.
[*] A valid route to the destination address is missing from the routing table.
[*] The tunnel address is routed through the tunnel itself.
[*] The ISP is blocking the traffic.
[*] An ACL is blocking the outbound traffic.
为什么答案是BCD,有没有人可以解释?
没有什么理论可以解释的,这就是一些现象,做实验可以验证 这个真的要英文好一点才好明白什么意思和解决问题。
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