The other benefit is that most ISPs have installed these lines in recent years and have put in the best services available. These can be anything from a T1, ISDN or highspeed modem lines. These type of connections in a direct office connect can cost thousands a dollars per month for the same service. The other positive side of a VPN is the security provided by this service. Each piece acts on its own and as part of an overall system protection.
Most readers here are probably familiar with the term firewall.
The concept of a firewall is to prevent unwanted access into someone else's network or computer either through software, viruses, hardware detection or other devious means. The VPN host uses this same method of detection by examining the data packets, internet addresses or port requests on incoming connections to decide what traffic is allowed to come through the VPN gate and attach to the computer or network. This method is also used on most routers, proxy servers, and stand-alone VPN products. Some of the better products also have packet filtration capability. This additional capability allows the data to be filtered for extra data or requests that are not normally used in any given situation.