Which protocol is typically used as the communication channel between the client and the DDNS provider?

The protocol typically used as the communication channel between the client and the Dynamic DNS (DDNS) provider is HTTP/HTTPS. DDNS clients communicate with DDNS servers to update their current IP address, and this communication is generally done over the HTTP or HTTPS protocol for security and reliability. HTTPS is particularly preferred due to its encrypted nature, ensuring that the information exchanged between the client and the DDNS provider is secure.

Protocols like DHCP, ARP, and ICMP serve different purposes in networking and are not used for communication between DDNS clients and providers. DHCP is used for network configuration, ARP for local network IP address resolution, and ICMP mainly for diagnostic and control purposes.