In case you host your sites on a dedicated hosting machine, you would expect that they shall perform super fast and that the access speed to them will depend entirely on the Internet connection of the website visitors. Nevertheless, this will not be the case in the event that the server has lousy network connectivity or relies on a network card, which simply just cannot deal with high volume of traffic. If this is the situation, it'll take a while for your sites to load if many people open them concurrently or visitors may see error messages. Thus you might lose customers as probably many people will not revisit your site if they have experienced issues or slow loading speeds. That is why you must pay attention to the network components of any new hosting server that you acquire and not just to the main hardware like Processor, RAM or hard drive.