IPsec vs L2TP vs PPTP-difference between IPsec, L2TP, PPTP

This page compares IPsec vs L2TP vs PPTP and mentions similarities and difference between IPsec, L2TP and PPTP.

Following table mentions similarities and difference between IPsec protocol, L2TP protocol and PPTP protocol types.

Feature	IPsec	PPTP	L2TP
Full form	IP Security	Point to Point Tunneling Protocol	Layer2 Tunneling Protocol
OSI Layer	Layer-3 i.e. network layer	Layer-2 i.e. data link layer	Layer-2 i.e. data link layer
Transport protocols	IP i.e. Internet protocol	IP, NetBEUI, IPX	IP, NetBEUI, IPX
Underlying protocol needed	IP	IP	IP, Frame Relay, X.25, ATM
No. of tunnels supported	1	1	several
User authentication or algorithm used	NO	YES, (PAP, EAP, CHAP, SPAP)	YES, (Same As Above)
Packet authentication/algorithm used	YES, (HMAC SHA-1, HMAC MD5)	NO	NO
Packet Encryption	YES, (DES, 3DES)	NO	NO
KEY MANAGEMENT	YES, (IKE)	NO	NO
Vulnerability of protocols to security attacks such as denial of service attack, man in the middle attack, dictionary attack, spoofing attack	Resistant	Not resistant	Not resistant
Appropriate use or application of protocol	IPsec transport mode is used in securing the intranet in unicast only mode.	Used for remote access VPN, Branch office VPN and Extranet VPN	Used for remote access VPN, Branch office VPN and Extranet VPN
Link for more information	IPsec	L2TP vs PPTP	L2TP vs PPTP

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