That's right.About VPN, In fact, it's not only a security technology. There are tens kinds of VPN, We can classify them into two classes, 1, Layer two VPN, 2, Layer 3 VPN.The latter example is IPsec VPN.There is also other VPN technologies, MPLS VPN.

whitetiger (whitetiger)
2001-4-12 -04:00
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