In the event that you host your sites on a dedicated hosting server, you would expect that they shall perform lightning fast and that the access speed to them shall depend exclusively on the Internet connection of the site visitors. Nevertheless, this is not going to be the case if the hosting machine has poor network connectivity or employs a network card, which simply cannot cope with high volume of site traffic. If this is the case, it'll take a long time for your websites to load if a lot of people open them simultaneously or visitors might even see error messages. Thus you could lose site visitors as most likely many people will not revisit your site in case they have experienced issues or slow loading speeds. That is why you must pay attention to the network components of any new server you purchase and not only to the main hardware like CPU, Ram memory or hard disk drive.