A web bug is commonly used to track a user's activity on a website. Which option best describes this?

• A. Tracking user activity
• B. Gaining admin access
• C. Infecting hosts
• D. Exfiltrating data

Answer: (A)

Web bugs work by embedding a tiny resource, often a 1x1 pixel image, in a webpage or email. When that resource is loaded, a request is sent to the server, allowing the operator to log details about the event—such as when the page or email was viewed, the IP address, and other contextual data. This mechanism is used to track user activity across a site or within emails, gathering analytics on which pages were accessed and when. That focus on observing and recording user behavior makes tracking user activity the best description. The other options describe actions like unauthorized access, malware spread, or data theft, which are not the primary purpose of a standard web bug.