Refer to the exhibit.
23
You are developing a migration plan to enable IPv6 in your IPv4 network. Starting at R3 and assumingdefault
IS-IS operations, what is likely to happen when you enable IPv6 routing on the link from R3 to R2?
A. Only R3 and R2 have IPv4 and IPv6 reachability.
B. R2 receives an IPv6 default route from R3.
C. Loopback reachability between all routers for IPv4 is lost.
D. All routers except R2 are reachable through IPv4.
E. R3 advertises the link from R3-R2 to R1, R4 and R5 only.
Answer: C
Explanation:
why always try to mislead people with stupid non-clear statements? when you say to start with R3 and enable IPv6 routing on the link from R3 to R2, do you mean after r2 also configured or not.
If r3-r2 link already with both afi, then the neighborshi up with v4/v6 reachability. For single-topo, the only key thing is if neighborship can comeup with new tlv. what else you want to play??
the guy who created questions, sometimes just to mislead with this kind of stupid.
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it sounds like a question for single/multi topology and transition. But as usual, it seems that they are afraid to let you know what they really mean.
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