If 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 will depend exclusively on the Internet connection of the visitors. However, this won't be the case in the event that the hosting machine has lousy network connectivity or uses a network card, which simply can't handle high volume of website traffic. If this is the case, it'll take a while for your websites to load if lots of people open them at the same time or visitors may see error messages. As a result you could lose customers as almost certainly many people won't revisit your internet site in case they have experienced issues or slow loading speeds. That's why you must pay attention to the network components of any new server you purchase and not only to the main hardware such as CPU, Ram memory or hard disk.