CCNP(300-420)ENSLD 第12题 答案

Gyrliam

大神们，这个题应该选什么。题库给的答案是C，但是我查了资料感觉C有待商榷， 根据排除法我认为应该选B。求解答
A:不可以considered as a final IPV6 Network
B: 我认为是正确选项
C:必须支持IPv4和IPv6协议
D: 应该是delivery across an IPv4 Infrastructure。

参考资料：IPv6 Implementation Guide, Cisco IOS Release 15.2M&T
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/15-2mt/ipv6-15-2mt-book/ip6-tunnel.html

QUESTION 12
Which design consideration must be made when using IPv6 overlay tunnels?
A. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network
architecture.
B. Overlay tunnels should only be considered as a transition technique toward a permanent solution
C. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol
stack.
D. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

lemontree0317

eigrpospf

B is correct.