In case you host your websites on a dedicated hosting machine, you would expect that they will perform very fast and that the access speed to them shall depend solely on the Internet connection of the website visitors. However, this is not going to be the case in the event that the hosting server has poor network connectivity or uses a network card, which just can't deal with high volume of traffic. If this is the case, it will take a very long time for your websites to load if many people open them concurrently or visitors could see error messages. Because of this you may lose customers as almost certainly many people will not return to your website if they have experienced problems or slow loading speeds. This is the reason why you need to pay attention to the network components of any new hosting machine you buy and not only to the main hardware which includes Central processing unit, RAM or hard drive.