Mastering Windows 2003 Server

The single most comprehensive and understandable book on the subject.
Coverage includes:

Configuring IP, DHCP, DNS, and WINS to achieve the right foundation for your network
DNS explained in everyday English, from basics to advanced design
Designing, running, and maintaining Active Directory-based domains with Server 2003 and 2000 Server
Running your own Web, FTP, and e-mail server with 2003
Controlling hundreds, even thousands, of workstations with group policies and security templates
Tuning and monitoring your network
Securing your network from split-brain DNS to AD delegation to group policies, logs, IPSec, PKI and more
Using Windows Server 2003 to share Internet connections
Complete coverage of all new 2003 features