cidr, inet, and mac data types

I've tried searching around and haven't been able to determine if SQL Server 2005 supports cidr, inet, or mac address data types. I have a database in PostgreSQL that I'm working on moving to SQL Server 2005 due to business requirements and it uses these data types.

No. There isn't a native data for cidr. However, you can just use one of the native datatypes.

http://sqlserver2000.databases.aspfaq.com/how-should-i-store-an-ip-address-in-sql-server.html