An engineer is trying to decide between using L2TP or GRE over IPsec for their site-to-site VPN implementation. What must be un solution?

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H Barral Vila · Accepted Answer

GRE over IPsec cannot be used as a standalone protocol, and L2TP can.

H Barral Vila · Answer

L2TP is an IP packet encapsulation protocol, and GRE over IPsec is a tunneling protocol.

H Barral Vila · Answer

L2TP uses TCP port 47 and GRE over IPsec uses UDP port 1701.

H Barral Vila · Answer

GRE over IPsec adds its own header, and L2TP does not.

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