In case you host your websites on a dedicated server, you would expect that they shall perform extremely fast and that the access speed to them shall depend exclusively on the Internet connection of the site visitors. Having said that, this is not going to be the case if the hosting machine has poor network connectivity or relies on a network card, which simply can't cope with high volume of website traffic. If this is the situation, it'll take quite a long time for your sites to load if lots of people open them concurrently or visitors may see error messages. Therefore you might lose website visitors as probably many people won't revisit your site if they have experienced difficulties or slow loading speeds. That's why you ought to pay attention to the network components of any new hosting server which you purchase and not just to the main hardware like Processor, RAM or hard disk drive.