What must an administrator typically install to utilize server management software?

An administrator typically installs SNMP, or Simple Network Management Protocol, to utilize server management software because it is specifically designed for managing and monitoring network devices and servers. SNMP allows for the collection of information about device performance and status, and it facilitates communication between servers and management systems. By using SNMP, administrators can set up alerts for various system events, track metrics, and perform remote management tasks effectively.

The other options relate to different networking protocols or technologies that do not serve the same role as SNMP in the context of server management. SMTP, or Simple Mail Transfer Protocol, is used for sending emails, while IPv6 refers to the most recent version of the Internet Protocol designed to replace IPv4 due to IP address exhaustion. UDP, or User Datagram Protocol, is a connectionless transport layer protocol that is used for sending messages without the reliability guarantees that other protocols, like TCP, offer. None of these options would provide the same functionality or utility as SNMP in server management scenarios.