Which protocol allows for communication over multiple protocols, including HTTP and FTP?

The correct choice is SOAP, which stands for Simple Object Access Protocol. SOAP is a protocol designed for exchanging structured information in the implementation of web services. It is highly extensible and can operate over various transport protocols, including HTTP, FTP, and others, enabling diverse application integrations.

One of the notable features of SOAP is its ability to formalize communication between different systems through a set of standards, incorporating not only the message format but also the communication protocols. This means that developers can utilize SOAP for complex web service interactivity across different platforms and environments.

Understanding SOAP's capacity to work with multiple protocols makes it valuable for applications that require robust messaging capabilities over various networking environments. This flexibility distinguishes it from other options, which may be more protocol-specific or limited in scope.