In case you host your websites on a dedicated hosting server, you would expect that they'll perform ultra fast and that the access speed to them will depend entirely on the Internet connection of the website visitors. Having said that, this is not going to be the case if the server has poor network connectivity or relies on a network card, which just cannot cope with high volume of site traffic. If this is the case, it will take a long time for your websites to load if a lot of people open them at the same time or visitors could see error messages. Because of that you may lose visitors as probably many people won't return to your internet site in the event that they have experienced issues or slow loading speeds. That's why you need to pay attention to the network components of any new hosting machine you get and not only to the main hardware such as CPU, Random access memory or hard disk.