In case you host your sites on a dedicated hosting server, you would expect that they shall perform extremely fast and that the access speed to them shall depend only on the Internet connection of the site visitors. However, this will not be the case in the event that the hosting machine has poor network connectivity or employs a network card, which simply can't handle high volume of site traffic. If this is the case, it shall take a long time for your internet sites to load if many people open them at the same time or visitors could see error messages. Because of this you could lose visitors as most likely many people will never revisit your website in case they have experienced problems or slow loading speeds. That is why you must pay attention to the network components of any new hosting server which you get and not only to the main hardware such as Processor, Ram memory or hard disk.