Which port is typically used for HTTP traffic when Carol is browsing the Web?

The port that is typically used for HTTP traffic is 80. When a web browser, like the one Carol is using, initiates a request to a web server using the Hypertext Transfer Protocol (HTTP), it communicates over this port by default. This means that web servers listen for incoming requests on port 80, and when users enter a web address in their browsers without a specified port, the browser automatically uses port 80 to connect.

In the context of web browsing and HTTP, using port 80 ensures that the communication between clients (browsers) and servers is standardized, facilitating seamless access to web resources. Other options listed do not serve as the standard HTTP port, which is why they are not suitable for this particular context.