With HostPapa, you have a choice to either self-manage your VPS or acquire a managed or a fully managed service. HostPapa's Managed VPS service includes updating and patching core operating system, backing up content and data on the server, installing SSL, and more. Fully managed VPS is a white-glove service that includes a dedicated team of server admins, server setup, DNS setup, content migration, custom Firewall rules, and more. For more details about this and other managed VPS services, please go to this article.
A Content Distribution Network (CDN) is a network of servers distributed geographically. The purpose of a CDN is to deliver content on the internet much faster. If a user in Toronto is trying to access your website, the closest server to them will take care of this. But someone coming to your website from Sydney, Australia, will be catered to by a server closest to them. The main host server holds your website content, and all the other servers have a cached version each.