Virtual Private Networks VPNs
What is a Virtual Private Network? In telecommunications, Virtual Private Networks VPNs provide a secure, reliable and cost-effective solution for communications across a centralized network. Virtual Private Networks VPNs are used to connect multiple remote sites and users to a network anywhere where there is Internet access. Virtual Private Networks are encrypted and authenticated through networking equipment and hardware at each remote site. Virtual Private Network solutions are typically more cost-effective than private leased lines and offer greater flexibility. Virtual Private Networks VPNs data connections can be comprised of DSL, T1, T3, OC and Ethernet.
There are several different types of Virtual Private Networks including MPLS based IP VPN, IPsec VPN and SSL IP VPN solutions. MPLS based IP VPN or MPLS IP-VPN is a Virtual Private Network over Multiprotocol Label Switching (MPLS) technology. MPLS IP VPN is scalable, secure and supports Quality of Service (QoS) for traffic engineering. IPsec VPN provides a Layer 3 VPN connection and is highly cost effective. SSL IP-VPN is used in remote access rather than site-to-site VPNs. SSL IP VPN supports only SSL applications which includes email and other applications.
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