JNCIE-SP: Juniper Networks Certified Expert – Service Provider — Question 1

Your customer is deploying a new data center in a collocation facility and will occupy several racks throughout the environment. The racks are not in close proximity and, in some cases, reside on different floors. The interconnected racks will never exceed a distance of more than 300 meters (925 feet) from each other. The connections within the customers environment are 10GbE and 40GbE. The customers requirements include high-performance operations, future proofing the connectivity design, and limiting the initial capital investment.
Which two recommendations would you provide the customer? (Choose two.)

Answer options

• A. Use multimode fiber connections between all customer racks.
• B. Use single-mode fiber connections within a customer rack.
• C. Use DAC connections between all customer racks.
• D. Use DAC connections within a customer rack.

Correct answer: B, D

Explanation

Using single-mode fiber connections within a customer rack (Option B) is ideal for high-performance operations and future-proofing because it supports longer distances and higher data rates. DAC connections within a customer rack (Option D) can be cost-effective and suitable for short distances. Options A and C are less favorable as multimode fiber and DAC connections between all racks may not meet the performance and distance requirements needed for future scalability.