id="id-XmC9SkSlfnI1hK"></a>Used interchangeably to indicate a single instance of a running kernel in either a physical server, virtual machine, or container. There might be multiple <em>services</em> worth monitoring on a single machine. The services may either be:
                                    </p>
                                    <ul>
                                        <li>Related to each other: for example, a caching server and a web server
                                        </li>
    