Dynamic Host Configuration Protocol (DHCP) is a network service used to automatically assign IP addresses and other network configuration details (such as subnet masks and default gateways) to devices on an enterprise-wide network. * Why Not A (DNS): DNS resolves domain names to IP addresses but does not allocate IP addresses. * Why Not B (Syslog): Syslog is used for logging system events, not IP address management. * Why Not C (Telnet): Telnet is a protocol for remote access, not for IP allocation. CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.6, DHCP concepts.