Usually a single machine placed in a private residence can be used to host one or more web sites from a usually consumer-grade broadband connection. These can be purpose-built machines or more commonly old PCs. Some ISPs actively attempt to block home servers by disallowing incoming requests to TCP port 80 of the user's connection and by refusing to provide static IP addresses. A common way to attain a reliable DNS host name is by creating an account with a dynamic DNS service. A dynamic DNS service will automatically change the IP address that a URL points to when the IP address changes.
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.
Once you decide you price range, you need to consider how long you'll need web hosting. If it's a short-term project—say, less than a month or two—you can typically receive a refund should you cancel your hosting within 60 days. Some companies offer 30-day money-back guarantees, others offer 90-day money-back guarantees. Once again, it's beneficial to do your homework.
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.
We believe managed hosting should empower rather than limit you. We offer automatic WordPress updates that you can leave on auto-pilot or schedule. We run the latest PHP versions, but allow you to switch between versions. We enable static caching for your website, but you can easily switch it off or add more layers, like dynamic cache and memcached so you get the performance you want.
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.