The Service Delivery Network: A Case Study 
by Mikael Lofstrand and Jason Carolan
April, 2006
Secure messaging has emerged as a core IT service. Most organizations today rely upon e-mail as a mission-critical application that serves key business processes and transports proprietary and confidential business information among authorized users. The case study in this article shows how to use Sun's Service Delivery Network (SDN) to guide the design of a secure, service-optimized network architecture for an example secure e-mail application. Secure e-mail was chosen for this case study because it is a familiar application that is relatively simple to describe and understand, allowing the reader to focus on the use of SDN rather than the details of an application. Note, however, that the SDN approach can be used to design network architectures that support almost any kind of application or service.
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