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 solely on the Internet connection of the visitors. However, this will not be the case if the hosting server has bad network connectivity or employs a network card, which simply just cannot deal with high volume of website traffic. If this is the case, it'll take a long time for your websites to load if lots of people open them concurrently or visitors may see error messages. Consequently you could lose customers as probably many people won't revisit your website in case they have experienced problems or slow loading speeds. This is why you must pay attention to the network components of any new server which you purchase and not only to the main hardware such as Central processing unit, Random access memory or hard drive.