Which menu item changes the current display filter and applies the changed filter immediately?

• A. Analyze -> Prepare a Filter
• B. Analyze -> Conversation Filter
• C. Analyze -> Enabled Protocols
• D. Analyze -> Apply as Filter

Answer: (A)

Changing what you see in the packet list requires editing the display filter and applying it so the view updates right away. The option to prepare a filter is designed for building a new display filter expression and applying it immediately, which replaces the current filter and refreshes the view as soon as you apply it. This directly matches the idea of changing the current display filter and seeing the results instantly.

The other options serve different tasks: filtering by conversations is a specialized view that narrows results by conversation rather than altering the general display filter, enabling or disabling protocols affects which protocols are dissected rather than which packets are shown, and applying as a filter typically uses an existing expression rather than opening a builder to create a new one on the spot.