GLYPH<SM590000> Communication for business-critical applications: Some operations within an integration  architecture do not require ensured delivery, for example ,  read operations or calls to  idempotent services where the caller can retry on failure. The convenience of HTTP is a  natural protocol for these types of interaction due to its universal availability across  platforms, operating systems, and applications. However, when completing  non-idempotent data-changing transactions on business-critical applications, HTTP has  limitations that can cause frustration and confusion for your clients, and a damaged  reputation for the business. We have all experienced the situation when we are completing  an order online when suddenly the order goes into an indeterminate state and it is unclear  whether the order has occurred. In a stateless integration architecture based on end to  end HTTP ,  recovering from fragile networks and application availability that cause the  above situations is challenging if not unfeasible. Messaging technologies such as IBM MQ  provide ensured delivery, where situations that can cause an end to end failure are  reduced, and there is improved recoverability in these cases. GLYPH<SM590000> Hybrid multicloud business critical communication: Within a traditional enterprise with a  single data center, your business-critical communication between applications is bound to  the data center. As enterprises embrace the cloud, this leads to a hybrid multicloud  enterprise with applications hosted across on-premises, public, and private clouds. When  communicating between clouds, the network becomes the weak link. Here, reliable  cross-cloud messaging is critical, enabling applications within each cloud to confidently  write messages locally within their own cloud and know that the messaging framework will  solve the problem of reliably getting them to their destination cloud once . Figure 3-23 shows multicloud messaging. Figure 3-23 Multicloud messaging 76  Accelerating Modernization with Agile Integration IBM Cloud AWS Multi-Cloud Deployment $ S S $ S S $ S S $ S S $ S S $ S S $ S S $ S S $ S S On Premise $ S S $ S S $ S S 6 H F X U H 0 H V V D J L Q J Multi-Cloud Messaging