This session focuses on .NET and Windows Communication Foundation (WCF) performance and scalability for services built with Windows Communication Foundation. The session includes information comparing/contrasting the performance of various different WCF bindings/encoding standards and security standards with actual benchmark results. Information on performance trade-offs, tuning for performance and performing your own load tests are covered. In addition, the session discusses interoperability between .NET 3.5-based services and non-Microsoft platforms, both Java Enterprise and OSS-based. Comparative benchmark data are presented and discussed with respect to WCF/business logic vs. equivalent workloads on Java Enterprise. The session also offers an overview for implementing load balancing and failover for WCF services.