JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 28

Which two statements are true about unified ISSU? (Choose two.)

Answer options

• A. It allows gradual implementation of new features.
• B. It reduces operating costs while delivering higher service levels.
• C. It involves network down time during software image upgrades.
• D. It requires graceful Routing Engine switchover (GRES) and nonstop active routing (NSR).

Correct answer: B, D

Explanation

Option B is correct because unified ISSU is designed to optimize service delivery and reduce costs. Option D is also correct as it highlights the requirement for GRES and NSR to ensure continuity. Options A and C are incorrect; unified ISSU aims to minimize downtime and allows for more efficient feature deployment.