300-420 · Question #399
300-420 Question #399: Real Exam Question with Answer & Explanation
The correct answer is A: adjacency issue between R12 and R30. There will be an adjacency issue between R12 and R30 because R12 only supports IPv6 on that link, while R30 is running both IPv4 and IPv6. If IPv6 is not consistently enabled and configured across both devices, adjacency may fail. There will be an adjacency issue between R13 (IPv
Question
Refer to the exhibit. The company is in the design phase of the network lifecycle, and this is the proposed design that the lead architect must validate. Which two issues must the architect recommend addressing? (Choose two.)
Options
- Aadjacency issue between R12 and R30
- Bconnectivity issue between area 1 and area 4
- Cadjacency issue between R10 and R11
- Dadjacency issue between R13 and R20
- Econnectivity issue between area 2 and area 3
Explanation
There will be an adjacency issue between R12 and R30 because R12 only supports IPv6 on that link, while R30 is running both IPv4 and IPv6. If IPv6 is not consistently enabled and configured across both devices, adjacency may fail. There will be an adjacency issue between R13 (IPv6-only) and R20 (IPv4/IPv6 dual-stack). If the protocols do not match, IS-IS adjacency cannot form.
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