John wants to utilize tcpdump to capture HTTPS packets. Assuming the service is running on its default port and his Ethernet adapter is eth0, what tcpdump command should he employ?

By using tcpdump flags such as -i to specify the interface, tcp to specify the protocol, and port to specify the port, John can capture the precise traffic he needs. The default port for HTTPS is 443. It should be noted that tcpdump does not have a -proto flag.