When a hostname is configured through the Cisco CLI which three naming conventions are part of the guidelines?

When configuring a hostname through the Cisco CLI, the naming conventions include: 1) Hostnames can consist of alphanumeric characters, dashes, and periods, but must start and end with an alphanumeric character; 2) They are case-insensitive, meaning "Router" and "router" are treated the same; and 3) The maximum length of a hostname is 63 characters. Additionally, hostnames should not include spaces or special characters other than dashes and periods.