If you host your websites on a dedicated hosting machine, you would expect that they shall perform extremely fast and that the access speed to them will depend only on the Internet connection of the visitors. However, this is not going to be the case in the event that the hosting machine has lousy network connectivity or uses a network card, which simply just cannot handle high volume of website traffic. If this is the situation, it'll take a long time for your sites to load if lots of people open them at the same time or visitors could see error messages. Because of this you might lose customers as most probably many people will not revisit your internet site in the event that they have experienced issues or slow loading speeds. That's why you ought to pay attention to the network components of any new server you get and not only to the main hardware such as Central processing unit, RAM or hard disk drive.