In the event that you host your sites on a dedicated hosting server, you would expect that they'll perform extremely fast and that the access speed to them shall depend only on the Internet connection of the visitors. Having said that, this won't be the case in the event that the server has lousy network connectivity or employs a network card, which just can't cope with high volume of traffic. If this is the situation, it will take a while for your sites to load if a lot of people open them concurrently or visitors could see error messages. Because of this you may lose customers as probably many people won't return to your internet site in the event that they have experienced issues or slow loading speeds. That is why you should pay attention to the network components of any new server that you get and not only to the main hardware like Processor, Random access memory or hard disk.