Windows 2008 Server

Edition Comparison by Technical Specification

Specification	Web	Standard	Enterprise	Data Center
Cross-File Replication (DFS-R)
Failover Cluster Nodes (Nodes)			16	16
Fault Tolerant Memory Sync
Hot Add Memory
Hot Add Processors
Hot Replace Memory
Hot Replace Processors
Network Access Connections (IAS)		50	Unlimited	Unlimited
Network Access Connections (RRAS)		250	Unlimited	Unlimited
Remote Desktop Admin Connections	2	2	2	2
Remote Desktop Services Gateway		250	Unlimited	Unlimited
Virtual Image Use Rights	Guest	Host + 1 VM	Host + 4 VM	Unlimited
x64 RAM	32 GB	32 GB	2 TB	2 TB
x64 Sockets	4	4	8	64

New and Updated Features in Windows Server 2008 R2

New/Updated Features	Web	Standard	Enterprise	Data Center
AD Rights Management Services
BranchCache™ Content Server
BranchCache™ Hosted Server
DirectAccess
Hyper-V™
Internet Information Services 7.5
Network Access Protection
Remote Desktop Services
Server Core
Server Manager
Windows Deployment Services
Windows PowerShell™

Edition Comparison by Server Role

Server Role	Web	Standard	Enterprise	Data Center
Active Directory Certificate Services		[1]
Active Directory Domain Services
Active Directory Federation Services
Active Directory Lightweight Directory Services
Active Directory Rights Management Services
Application Server
DHCP Server
DNS Server
Fax Server
File Services		[2]
Hyper-V
Network Policy and Access Services		[3]
Print and Document Services
Remote Desktop Services		[4]
Web Services (IIS)
Windows Deployment Services

[1] Limited to creating Certificate Authorities – no other ADCS features (NDES, Online Responder Service.)
[2] Limited to 1 standalone DFS root.
[3] Limited to 250 RRAS connections, 50 IAS connections, and 2 IAS Server Groups.
[4] Limited to 250 Remote Desktop Services Gateway connections.