In the event that you host your websites on a dedicated hosting machine, you would expect that they will perform lightning fast and that the access speed to them will depend exclusively on the Internet connection of the website visitors. Having said that, this is not going to be the case if the hosting machine has bad network connectivity or relies on a network card, which just can't handle high volume of site traffic. If this is the case, it will take quite a long time for your websites to load if a lot of people open them simultaneously or visitors might even see error messages. Because of that you could lose customers as most likely many people will not revisit your site in the event that they have experienced issues or slow loading speeds. This is the reason why you should pay attention to the network components of any new hosting server you purchase and not just to the main hardware like Processor, Ram memory or hard disk.