...ion), it has itself issued a recommendation that VPN users should use L2TP/IPsec or SSTP instead <ref> Microsoft Security Advisory 2743314: Unencapsulated M Encapsulation for L2TP/IPsec packets consists of two layers. First L2TP encapsulation: A PPP frame (an I

* IPSec | [[AppleTalk]], [[Internet Control Message Protocol|ICMP]], [[IPsec]], [[IPv4]], [[IPv6]]