350-901 Question #98: Real Exam Question with Answer & Explanation

Question

Given an application that implements a basic search function as Well as a video upload function , which two load-balancing approaches optimize the application's user experience? (Choose two.)

Options

• AVideo upload requests should be routed to the endpoint using an intermediate hop.
• BVideo upload requests should be routed to the endpoint with highest data throughput.
• CVideo upload requests should be routed to the endpoint with lowest round-trip latency.
• DSearch requests should be routed to the endpoint with lowest round-trip latency.
• ESearch requests should be routed to the endpoint with highest data throughput.

Explanation

Different traffic types have different performance requirements - video uploads need maximum throughput while search queries need minimum latency to feel responsive.

Common mistakes.

• A. Routing through an intermediate hop adds additional network hops and latency, which degrades performance for any traffic type and provides no benefit for video uploads.
• C. Lowest round-trip latency is the correct metric for interactive search requests, not for video uploads where sustained throughput - not ping time - determines how quickly large files complete.
• E. Highest data throughput matters for bulk transfers like video uploads, not for search queries, where the payload is tiny and latency determines responsiveness.

Concept tested. Load balancing metrics by traffic type

Reference. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/App_Networking/load_balancing.html

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