It is generally recommended that computer names be under 15 characters for convenience and compatibly with NetBIOS and WINS. The computer name can use a mix of letters and numbers, but you should avoid hyphens, underscores, or using all numeric characters.If you are running TCP/IP, you can technically use up to 63 characters for the DNS name, but if you have a large and deep Active Directory structure with several sub-domains, you can run out of spaces quickly.
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