In case you host your websites on a dedicated hosting machine, you would expect that they'll perform extremely fast and that the access speed to them shall depend solely on the Internet connection of the site visitors. Nevertheless, this is not going to be the case in case the hosting machine has poor network connectivity or relies on a network card, which just cannot deal with high volume of site traffic. If this is the case, it shall take quite a long time for your websites to load if lots of people open them simultaneously or visitors may see error messages. Therefore you might lose site visitors as most probably many people will never revisit your website if they have experienced issues or slow loading speeds. This is the reason why you ought to pay attention to the network components of any new hosting server you get and not only to the main hardware such as CPU, Ram memory or hard drive.