Recently, we've added more formal uptime monitoring to our review process, and the results show that most Web hosts do an excellent job of keeping sites up and running. If they don't, they suffer for it in our scoring. Even if they get everything else right, sites with uptime problems aren't eligible for high scores. All services suffer ups and downs, sometimes for reasons beyond their control. Those sites that fail to address the problem are penalized accordingly.
Unlike a shared server, which powers multiple sites, a dedicated server hosts just one site. Website stability and reliability are the twin benefits of investing in a dedicated server—your site leverages a server's full CPU, RAM, and storage resources, as it doesn't share them with other sites. You shouldn't underestimate the importance of these benefits in terms of site speed and reliability. 

Dedicated servers sound pretty great, right? They are. That said, you should be aware of their relatively high prices. Setting up shop on a dedicated server will likely cost you more than $100 per month; shared servers, on the other hand, are far less expensive. The cheapest web hosting services will lease you space on the web for well under $10 per month. In addition, you'll need to handle firewalls and maintenance yourself unless you opt for a managed server, which costs even more.
Alexandra Leslie’s interest in website administration was sparked in her teens, priming her for a fast-paced career in managing, building, and contributing to online brands, including HostingAdvice, Forbes, and the blogs of prominent hosting providers. She brings to the table firsthand experience in reviewing web hosts, perfecting website design, optimizing content, and walking site owners through the steps that add up to a successful online presence. Today, she combines her extensive writing experience with technical understanding to unpack some of the most complex topics that daunt novice website owners, as well as the subjects that excite veteran technologists within the HostingAdvice readership.

Dedicated hosting server providers utilize extreme security measures to ensure the safety of data stored on their network of servers. Providers will often deploy various software programs for scanning systems and networks for obtrusive invaders, spammers, hackers, and other harmful problems such as Trojans, worms, and crashers (Sending multiple connections). Linux and Windows use different software for security protection.
The answer to this question largely depends on two factors. Are you new to server technology and not very interested? In this case, Windows is the easiest option to get where you want to go. Do you already have experience with Linux or would you like to familiarize yourself with this operating system? If so, Linux gives you more freedoms to configure your server, and you will be using an operating system that is less vulnerable to attacks from the Internet. Linux is also open source and therefore free. 
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