In case you host your websites on a dedicated hosting machine, you would expect that they will perform ultra fast and that the access speed to them shall depend exclusively on the Internet connection of the website visitors. Having said that, this will not be the case in case the hosting server has poor network connectivity or uses a network card, which just can't handle high volume of traffic. If this is the situation, it'll take quite a long time for your websites to load if lots of people open them at the same time or visitors might even see error messages. Thus you might lose website visitors as probably many people will never return to your website in the event that they have experienced problems or slow loading speeds. That is why you must pay attention to the network components of any new hosting machine you purchase and not just to the main hardware such as CPU, Ram memory or hard disk drive.