廣域網路的虛擬私有網路』(WAN-VPN)
Internet - VPN
『安全閘門』(Secuirty Gateway, SG)
隧道協定(Tunneling Protocol)
⭐
PPTP(Point to Point Tunneling Protocol)
⭐
IP-Sec⭐
SSL
LP2P 第二層隧道協定
Network Virtualization