VPN

Site-to-Site V P N's are an alternative W A N infrastructure used to connect branch offices, home offices, or business partners' sites to all or portions of a company's network. V P N s do not inherently change private W A N requirements--such as support for multiple protocols, high reliability, and extensive scalability--but instead meet these requirements more cost-effectively and with greater flexibility. Site-to-Site V P N s use the most pervasive transport technologies available today, such as the public Internet or service provider IP networks, by employing tunneling and encryption for data privacy and QoS for transport reliability.

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