In the first quarter of 2015, 294 million domain names had been registered. A large fraction of them are in the com TLD, which as of December 21, 2014, had 115.6 million domain names, including 11.9 million online business and e-commerce sites, 4.3 million entertainment sites, 3.1 million finance related sites, and 1.8 million sports sites. As of July 2012 the com TLD had more registrations than all of the ccTLDs combined.
The user gets his or her own Web server but is not allowed full control over it (user is denied root access for Linux/administrator access for Windows); however, they are allowed to manage their data via FTP or other remote management tools. The user is disallowed full control so that the provider can guarantee quality of service by not allowing the user to modify the server or potentially create configuration problems. The user typically does not own the server. The server is leased to the client.
In terms of what many vendors call unlimited service, Web Hosting Pad's terms of service indicate that their definition of unlimited is what they call "incremental." Basically, as you need more capability, they want to discuss that with you, both to help you get the most out of their services, and to make sure you're using their systems without abusing them.
The network infrastructure that powers our web hosting servers delivers 99.9% uptime for every calendar month, excluding scheduled maintenance. We use redundant bandwidth providers, routers and switches to provide full redundancy at all levels within our network. As a result, our network uptime is among the best around, and we’re proud of the rockin’ performance it delivers.
A fully qualified domain name (FQDN) is a domain name that is completely specified with all labels in the hierarchy of the DNS, having no parts omitted. Labels in the Domain Name System are case-insensitive, and may therefore be written in any desired capitalization method, but most commonly domain names are written in lowercase in technical contexts.
Shared hosting is like an apartment building where the building or server has many tenants or hosting accounts sharing the space and the utilities. This works just fine if you have a small family but if everyone in the building has ten roommates move in who are constantly running the water and using the wifi then the water pressure and wifi speed start to suffer. The key to shared hosting is that it is meant for small business websites, sure you can pack the roommates or files in like sardines but it will really be uncomfortable.
Traditionally, Windows-based hosting costs more money than Linux hosting as a result of the licensing fees assessed by Microsoft (Linux is open source and therefore free to use). However, this is less true today. Some companies, like 1&1 and GoDaddy offer hosting packages that cost the about same, regardless of which operating system you choose to run.
Many services offer a low "starting price," but require you to prepay for two or three years of service to get that price. After the promotional period, the renewal price for some services can be two, three, or even four times the initial promotional pricing. While the initial deal might be incredible, the cost of transferring your site (or paying the added fee) in a couple of years may be something to consider.