(Comprehensive tutorial on Windows2003 domain controller if the number of PCs in a general network is less than 10, it is recommended to adopt the working mode of peer-to-peer network. If there are more than 10 pcs, it is recommended to adopt the management mode of domain, because the domain can provide a centralized management, which is much better than the decentralized management of peer-to-peer network. How to promote a member server to domain controller?)