What must be accomplished before you can download new Nessus plugins?

• A. Activate serial number
• B. Install Nessus on Windows
• C. Run a full scan
• D. Update plugins manually

Answer: (A)

Activating the Nessus serial number unlocks access to the plugin update feed. The product must be licensed and validated with the vendor before it can reach the plugin servers to download or update plugins. Without this activation, Nessus cannot fetch new plugins, so you wouldn’t be able to download updates.

Installing Nessus on Windows is just the platform setup and doesn’t by itself grant plugin access. Running a full scan doesn’t enable or affect plugin downloads; it simply uses whatever plugins are currently available. Updating plugins manually isn’t the normal workflow, since plugin updates are delivered automatically from the update server once activation is completed.