If you host your sites on a dedicated server, you would expect that they will perform very fast and that the access speed to them shall depend only on the Internet connection of the visitors. Nevertheless, this will not be the case in case the hosting machine has poor network connectivity or uses a network card, which simply can't cope with high volume of site traffic. If this is the case, it'll take quite a long time for your sites to load if lots of people open them at the same time or visitors could see error messages. Because of that you could lose visitors as almost certainly many people won't return to your internet site in the event that they have experienced difficulties or slow loading speeds. This is why you ought to pay attention to the network components of any new server that you acquire and not only to the main hardware like Central processing unit, Ram memory or hard disk.