Hosting security or host security pretty much just means protecting or securing the operating system, resources as well as the filesystem from anybody who is trying to break into the things I mentioned earlier. They protect those files from any unauthorized access, destruction, or any sort of modification. Hosting security can actually be considered to contrast to network security as well as application security. A few examples of network and application security are VPNs, firewalls, Apache, and many more. So, if you were wondering what hosting security means, this is a small explanation so that you now know what this word means.