VPNs using the Internet have the potential to solve many of these business networking problems.
VPNs allow network managers to connect remote branch offices and project teams to the main corporate network economically and provide remote access to employees while reducing the in-house requirements for equipment.
Rather than depend on dedicated leased lines or frame relay's permanent virtual circuits (PVCs), an Internet-based VPN uses the open, distributed infrastructure of the Internet to transmit data between corporate sites.
Companies using an Internet VPN set up connections to the local connection points (called points-of-presence [POPs]) of their Internet service provider (ISP) and let the ISP ensure that the data is transmitted to the appropriate destinations via the Internet, leaving the rest of the connectivity details to the ISP's network and the Internet infrastructure.
Because the Internet is a public network with open transmission of most data, Internet-based VPNs include measures for encrypting data passed between VPN sites, which protects the data against eavesdropping and tampering by unauthorized parties.
In addition, VPNs are not limited to corporate sites and branch offices. As an added advantage, a VPN can provide secure connectivity for mobile workers. These workers can connect to their company's VPN by dialing into the POP of a local ISP, which reduces the need for long-distance charges and outlays for installing and maintaining large banks of modems at corporate sites.
While VPNs offer direct cost savings over other communications methods (such as leased lines and long-distance calls), they can also offer other advantages, including indirect cost savings as a result of reduced training requirements and equipment, increased flexibility, and scalability.
VPNs allow network managers to connect remote branch offices and project teams to the main corporate network economically and provide remote access to employees while reducing the in-house requirements for equipment.
Rather than depend on dedicated leased lines or frame relay's permanent virtual circuits (PVCs), an Internet-based VPN uses the open, distributed infrastructure of the Internet to transmit data between corporate sites.
Companies using an Internet VPN set up connections to the local connection points (called points-of-presence [POPs]) of their Internet service provider (ISP) and let the ISP ensure that the data is transmitted to the appropriate destinations via the Internet, leaving the rest of the connectivity details to the ISP's network and the Internet infrastructure.
Because the Internet is a public network with open transmission of most data, Internet-based VPNs include measures for encrypting data passed between VPN sites, which protects the data against eavesdropping and tampering by unauthorized parties.
In addition, VPNs are not limited to corporate sites and branch offices. As an added advantage, a VPN can provide secure connectivity for mobile workers. These workers can connect to their company's VPN by dialing into the POP of a local ISP, which reduces the need for long-distance charges and outlays for installing and maintaining large banks of modems at corporate sites.
While VPNs offer direct cost savings over other communications methods (such as leased lines and long-distance calls), they can also offer other advantages, including indirect cost savings as a result of reduced training requirements and equipment, increased flexibility, and scalability.
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