If you host your internet sites on a dedicated hosting machine, you would expect that they will 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 the event that the hosting machine has bad network connectivity or uses a network card, which simply just cannot deal with high volume of website traffic. If this is the case, it will take a long time for your websites to load if lots of people open them concurrently or visitors could see error messages. Because of this you might lose site visitors as most likely many people will never return to your internet site in case they have experienced issues or slow loading speeds. That is why you need to pay attention to the network components of any new hosting machine you get and not just to the main hardware which includes Processor, Random access memory or hard drive.