The use of a Dependency Manager can resolve conflicts in a Jenkins pipeline caused by dependency issues. It helps manage and resolve dependencies efficiently, ensuring a smoother pipeline execution.

Jenkins's integration with Kubernetes is key for automating deployments in a continuous delivery pipeline. Kubernetes provides container orchestration, allowing for efficient deployment, scaling, and management of containerized applications.

Jenkins administrators can ensure backward compatibility by testing plugin updates in a staging environment before applying them to the production environment. This helps identify and address any compatibility issues proactively.

Offloading jobs to distributed nodes is achieved by configuring Jenkins Slaves. These are additional machines that Jenkins can use to execute build jobs, thereby improving performance.

The Plugin Manager page in Jenkins is where users can view and manage all installed plugins, including their versions and statuses. It's a crucial part of maintaining and updating Jenkins functionality.

To improve build times, configuring caching for frequently used dependencies can be effective. Caching dependencies locally reduces the need to fetch them repeatedly, thereby speeding up the build process.

Implementing a Backup and Restore system within Jenkins is crucial for quickly restoring functionality in case of system failures. Regular backups help in safeguarding Jenkins configurations and data.

Configuring Jenkins with email notifications is a common practice for real-time build failure alerts. Email provides a reliable communication channel, and Jenkins can be set up to send notifications to relevant team members in case of build failures.

User permissions in Jenkins can be fine-tuned using the Matrix-based authorization strategy. This strategy allows administrators to assign specific permissions to users or groups for different Jenkins resources.

For advanced reporting in Jenkins, the integration of ELK Stack (Elasticsearch, Logstash, and Kibana) is essential. ELK Stack provides powerful log analysis and visualization capabilities, offering detailed insights into the CI/CD process and facilitating troubleshooting.