Atlassian provides a comprehensive overview of the Jira architecture at https://developer.atlassian.com/server/jira/platform/architecture-overview. However, with regards to the day-to-day administration and utilization of Jira, we do not need to go into the details of this; the information provided can be overwhelming at first glance. For this reason, we have summarized a high-level overview, which highlights the most important components in the architecture, as shown in the following diagram: