Which of the following processes handles the External Data Representation (XDR) protocol to provide an agreement between the data syntax running between the different platforms in computer network?

The External Data Representation (XDR) protocol is handled by Application-specific processes (Presentation layer in OSI model) to standardize data format across different platforms. XDR ensures that data can be interpreted correctly regardless of the sender's or receiver's architecture. Network-specific and host-specific processes handle routing and interface issues, not data syntax standardization.