If you host your websites on a dedicated hosting server, you would expect that they'll perform lightning 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 uses a network card, which simply can't deal with high volume of traffic. If this is the case, it will take a while for your sites to load if a lot of people open them simultaneously or visitors might even see error messages. Therefore you could lose customers as most likely many people won't return to your site in case they have experienced difficulties or slow loading speeds. This is the reason why you should pay attention to the network components of any new hosting machine you buy and not only to the main hardware which includes Central processing unit, Random access memory or hard disk.