What is the difference between IKEv1 and IKEv2?

IKE is the short form of Internet Key Exchange. Both IKEv1 and IKEv2 are a set of rules that show how data is exchanged or transmitted. The v1 part of IKEv1 is talking about the first version of the protocol; v2 means the second version of the protocol. When two parties are exchanging or transmitting data, both IKEv1 and IKEv2 provide security for the data being exchanged. However, there are still some differences between the two.

First, IKEv1 is the first creation, while the second was created as the newer version of the two. While their functions are almost the same, IKEv2 has so many advantages over IKEv1. First, IKEv1 consumes more bandwidth compared to IKEv2. This reason alone is why most people use IKEv2. Another difference between the two is that EAP authentication is included in IKEv2 but cannot be found in IKEv1. IKEv2 also has a feature known as 'mobike', whereas the feature is absent in IKEv1.