What are some of the characteristics of Nokia's implementation of non-stop routing?

Comprehensive and Detailed Explanation From Exact Extract:

From Nokia 7750 SR OS High Availability Guide (Non-Stop Routing Behavior):

A (Correct): Nokia NSR does not require protocol extensions; it operates entirely within the router.

C (Correct): NSR is fully transparent to neighboring routers.

B: NSR is supported by OSPF, IS-IS, and BGP — not limited to OSPF/IS-IS only.

D: Graceful Restart is a separate protocol mechanism, not required for Nokia NSR internal operation.

Thus, correct answers: A, C.

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