In case you host your websites on a dedicated hosting server, you would expect that they'll perform ultra fast and that the access speed to them will depend solely on the Internet connection of the site visitors. Nevertheless, this will not be the case in case the server has bad network connectivity or relies on a network card, which simply just can't cope with high volume of website traffic. If this is the situation, it'll take a while for your websites to load if lots of people open them simultaneously or visitors could see error messages. Consequently you could lose site visitors as most probably many people won't return to your site in case they have experienced difficulties or slow loading speeds. This is why you ought to pay attention to the network components of any new server that you buy and not just to the main hardware like CPU, RAM or hard drive.