This read-create IpAddress gives the TFTP (or other network) server's address to copy the configuration file to or from, and must be set whenever either file type is networkFile; the all-zero and all-ones addresses are explicitly disallowed. Admins use it to point a config backup or restore operation at the right server. For example, an admin scheduling nightly config backups would set copyServerAddress to their TFTP backup server's IP before starting the copy.