A Technical Consultant is implementing an experience site for a government agency where they will be accepting grant applications during a specific…

To ensure an Experience Site can handle a significant surge in traffic for grant applications, a multi-layered technical strategy is essential. First, computationally intensive operations triggered by application submission should be offloaded to asynchronous processes (C) to prevent synchronous governor limit exceptions and ensure a responsive user interface. Second, implementing a Content Delivery Network (CDN) reduces server load for static assets, while a waiting room (or virtual queue) manages the influx of users, preventing the site from being overwhelmed (D). Finally, the entire solution must be validated with a load testing tool (E) to simulate the expected user volume, identify performance bottlenecks, and confirm the system's stability and scalability before the go-live event.

A. Perform UAT testing to find defects in the code: User Acceptance Testing (UAT) primarily validates functional requirements and business processes from an end-user perspective, not the system's performance under high-concurrency stress.

B. Set up IP restrictions to control who can access the website and when: IP restrictions are a security measure for access control based on location. This does not improve the system's capacity to handle a high volume of legitimate traffic.

1. Asynchronous Processing (C): Salesforce Architects, Architect's Guide to Asynchronous Processing in Salesforce. This guide details how to use asynchronous tools like Queueable Apex to "perform processing-intensive operations in the background," which is critical for handling high-volume transactions without impacting the user experience or hitting synchronous governor limits.

2. CDN and Waiting Rooms (D): Salesforce Help, High-Traffic Sites for Experience Cloud. This documentation outlines strategies for high-volume sites, including the use of a CDN to "improve page load times." It also introduces the concept of "Experience Cloud Visitor Surge Protection," which functions as a virtual waiting room to "control the flow of traffic to your site during visitor surges."

3. Load Testing (E): Salesforce Help, Performance Testing. This official document states, "Performance testing is the customer’s responsibility... to simulate their projected production usage and ensure that their implementation can scale to meet their needs." It outlines the necessity of conducting such tests in a full-copy sandbox to validate performance before deployment.