MCSE Windows Server 2003 Networking

You are creating a procedures document for your company's server administrators. As part of this document, you are defining the recommended settings for each service that is installed by default on a computer running Windows Server 2003. On one server, you notice that the HTTP SSL service is disabled, and you want to document the server configurations for which it should be enabled. For which other service must you ensure that the HTTP SSL service is running?