H12-821_V1.0 Question #1026: Real Exam Question with Answer & Explanation

Question

On an IS-IS network, each router can generate LSPs. Which of the following events can trigger the generation of a new LSP? A. Related IS-IS interfaces go up or down. B. Periodic updates occur. C. New area IP routes change one. D. The IS-IS interface cost is increased.

Explanation

The correct events that trigger the generation of a new LSP are A. Related IS-IS interfaces go up or down, B. Periodic updates occur, and D. The IS-IS interface cost is increased. The explanation explicitly states: 'Interface status changes: An interface going up or down can lead to LSP updates. Periodic updates: IS-IS periodically regenerates LSPs to ensure link-state information remains synchronized across the network. Interface cost changes: Any modification to interface costs results in a new LSP to reflect the updated cost in the network.'

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