AD0-E104: Adobe Experience Manager Sites Architect

AEM Dispatcher serves cached content and retrieves a newly rendered page from its attached Publish instance when the cached content is invalid. Because the stale-content behavior is isolated to one data center, the relevant fault domain is that data center’s Dispatcher and its connected Publish instances; an unavailable or out-of-date Publish instance can intermittently return older content. Adobe documents that Dispatcher uses Publish instances for rendering and that cache invalidation is required when content is activated.