If 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 entirely on the Internet connection of the website visitors. Having said that, this won't be the case in case the hosting server has bad network connectivity or uses a network card, which simply cannot deal with high volume of website traffic. If this is the situation, it will take quite a long time for your internet sites to load if lots of people open them at the same time or visitors may see error messages. Therefore you could lose visitors as probably many people won't return to your website in case they have experienced difficulties or slow loading speeds. That's why you must pay attention to the network components of any new hosting machine you get and not only to the main hardware which includes Central processing unit, RAM or hard drive.