In case you host your sites on a dedicated server, you would expect that they shall perform lightning fast and that the access speed to them will depend entirely on the Internet connection of the visitors. However, this won't be the case if the hosting machine has poor network connectivity or employs a network card, which simply cannot handle high volume of traffic. If this is the case, it will take a while for your websites to load if many people open them simultaneously or visitors could see error messages. Therefore you may lose website visitors as probably many people won't revisit your internet site in case they have experienced problems or slow loading speeds. That's why you should pay attention to the network components of any new server that you acquire and not only to the main hardware such as CPU, Random access memory or hard disk.