正解:D
The PCAP file in the exhibit shows a Transmission Control Protocol (TCP) communication between two IP addresses. In the data section of the packet capture, "pdy/3.1... http/1" isvisible, indicating that HTTP (Hypertext Transfer Protocol) is being used as the application protocol for this communication.
References := The Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course material covers the analysis of network traffic using tools like packet analyzers to identify application protocols in use1.