What protocol is primarily used for network device management?

The primary protocol used for network device management is Simple Network Management Protocol (SNMP). SNMP is specifically designed for managing devices on IP networks, allowing network administrators to monitor performance, manage configurations, and troubleshoot network issues efficiently. It operates by enabling devices like routers, switches, servers, and other network elements to communicate their operational statistics and statuses to a management station.

One of the key features of SNMP is its ability to use a variety of message types such as "Get," "Set," and "Trap" to facilitate real-time monitoring and management. This makes it particularly suited for managing a variety of devices across diverse network environments, providing a standardized framework for device management.

Other protocols listed serve different purposes. Internet Control Message Protocol (ICMP) is primarily used for diagnostic and error-reporting tasks within IP networks, while Hypertext Transfer Protocol (HTTP) is used for transferring web pages and resources over the internet. File Transfer Protocol (FTP) is designed for transferring files between clients and servers, and is not specifically tailored for device management. Hence, SNMP stands out as the most relevant and widely utilized protocol for network device management.