Chapter 3: Configuring Jenkins

1. Yes, and the image name is jenkins/jenkins.
2. A Jenkins master is the main instance that schedules tasks and provides the web interface, while a Jenkins agent (slave) is the additional instance that's only dedicated to executing jobs.
3. Vertical scaling means adding more resources to the machine while the load increases. Horizontal scaling means adding more machines while the load increases.
4. SSH and Java Web Start.
5. A permanent agent is the simplest solution, and it means creating a static server with all the environments prepared to execute a Jenkins job. On the other hand, a permanent Docker agent is more flexible; it provides the Docker daemon, and all the jobs are executed inside Docker containers.
6. In case you use dynamically provisioned Docker agents and the standard ones (available on the internet) do not provide the execution environment you need.
7. When your organization needs some templated Jenkins to be used...