An upgrade to a web application, which supports 400 users at four sites, is being tested. The application runs on four servers behind a load balancer. The following test plan is proposed: - Have 50…

Sizing tests evaluate if system resources can handle expected loads, but this plan does not stress the system with maximum users or data.

Connectivity testing verifies that users and systems can establish and maintain communication links to the application servers across the network, which is precisely what assigning specific users from different sites to individual servers achieves.

High availability testing involves simulating component failures to ensure continuous service, which is not part of this plan.

Performance testing measures metrics like response time and throughput under load, which this plan does not specify or aim to quantify beyond basic functionality.