In the event that you host your internet sites on a dedicated hosting server, you would expect that they shall perform extremely fast and that the access speed to them shall depend only on the Internet connection of the site visitors. Having said that, this will not be the case in case the hosting server has poor network connectivity or relies on a network card, which simply just can't handle high volume of site traffic. If this is the case, it shall take quite a long time for your websites to load if many people open them concurrently or visitors might even see error messages. Because of this you might lose customers as most likely many people will never revisit your internet site in case they have experienced issues or slow loading speeds. This is why you ought to pay attention to the network components of any new hosting machine you purchase and not only to the main hardware like CPU, RAM or hard disk drive.