If you host your internet sites on a dedicated server, you would expect that they will perform extremely fast and that the access speed to them shall depend solely on the Internet connection of the visitors. However, this will not be the case in the event that the hosting machine has bad network connectivity or employs a network card, which simply can't handle high volume of website traffic. If this is the situation, it'll take quite a long time for your internet sites to load if many people open them simultaneously or visitors may see error messages. Because of that you could lose customers as probably many people will not revisit your website in case they have experienced issues or slow loading speeds. This is why you must pay attention to the network components of any new hosting machine that you buy and not only to the main hardware which includes Processor, Random access memory or hard disk drive.