Which command prevents the router from attempting to load a startup config from TFTP during boot (fixes the tftp://255.255.255.255/... socket error)?

The no service config command prevents the router from attempting to load a configuration from a TFTP server during the boot process. By default, Cisco IOS devices try to locate a configuration file via TFTP if a startup configuration is not found in NVRAM, which can lead to the "tftp://255.255.255.255/..." error message. Disabling this service stops these attempts. write erase reload clears the startup configuration and reloads the router, which doesn't address the TFTP attempt itself but rather the absence of a local config. reload noconfirm reloads the router without prompting for confirmation, which is unrelated to the TFTP issue. copy run start saves the running configuration to NVRAM, ensuring a local startup config exists, but no service config directly addresses the TFTP boot attempt behavior.