If you host your sites on a dedicated hosting machine, you would expect that they'll perform very fast and that the access speed to them will depend exclusively on the Internet connection of the visitors. However, this won't be the case in the event that the hosting machine has lousy network connectivity or relies on a network card, which simply can't handle high volume of traffic. If this is the situation, it will take a very long time for your sites to load if a lot of people open them concurrently or visitors may see error messages. Because of this you may lose website visitors as probably many people will never return to your website in case they have experienced problems or slow loading speeds. This is the reason why you ought to pay attention to the network components of any new hosting machine that you purchase and not only to the main hardware which includes Processor, Random access memory or hard disk drive.