A primer on Exchange 2007 server roles

One of the first concepts you need to understand when planning an Exchange Server 2007 deployment (even in a lab) is what the server roles are and when to use them. The server roles in Exchange 2007 are:

• Mailbox Server
• Client Access Server
• Hub Transport Server
• Edge Transport Server
• Unified Messaging Server

In this tutorial, I provide a closer look at each of these server roles and explain its significance in an Exchange Server 2007 design and infrastructure.

Figure 1: Selecting server roles during Exchange Server 2007 Setup

TUTORIAL: A PRIMER ON EXCHANGE 2007 SERVER ROLES

 Home: Introduction
 Part 1: The Exchange 2007 Client Access Server (CAS) role
 Part 2: The Exchange 2007 Hub Transport Server role
 Part 3: The Exchange 2007 Mailbox Server role
 Part 4: The Exchange 2007 Edge Transport Server role
 Part 5: The Exchange 2007 Unified Messaging Server role
 Part 6: Server role installation caveats and supporting information

Fuente: http://searchexchange.techtarget.com/tutorial/A-primer-on-Exchange-2007-server-roles