Supporting Messaging Clients

Front-End/Back-End Architecture

In previous versions of Exchange, the information store managed the databases and client access protocols such as IMAP4, POP3, MAPI, and Network News Transfer Protocol (NNTP). In Exchange 2000, the Internet access protocols have been removed from the store and are managed by Internet Information Services (IIS) instead. Deploying a front-end/back-end configuration makes it possible to manage the Internet access protocols on a server that is separate from the one on which the store and databases run. Essentially, a bank of protocol servers handle the incoming client connections while the store servers are dedicated to running the databases.

Benefits of Front-End/Back-End Architecture

The main benefits of a front-end/back-end configuration are a unified namespace and reduced overhead for Secure Sockets Layer (SSL) encryption.