In case you host your sites on a dedicated hosting machine, you would expect that they shall perform lightning fast and that the access speed to them will depend only on the Internet connection of the visitors. Nevertheless, this is not going to be the case in case the hosting server has bad network connectivity or relies on a network card, which simply just can't cope with high volume of traffic. If this is the situation, it'll take a while for your sites to load if lots of people open them at the same time or visitors could see error messages. Because of this you might lose site visitors as most likely many people will not return to your internet site in the event that they have experienced issues or slow loading speeds. This is why you must pay attention to the network components of any new hosting machine that you get and not just to the main hardware such as Central processing unit, Ram memory or hard drive.