Internet Protocol Security $($IPsec$)$ is a secure network protocol suite that authenticates and encrypts the packets of data to provide secure encrypted communication between two computers over an Internet Protocol network. Which of the following statements about IPSec is not true?

IPSec provides security at transport layer.

IPSec operates in either transport mode or tunnel mode.

In IPSec, Virtual Private Networks $($VPN$)$ can be created by transport mode.

In IPSec, Authentication Header $($AH$)$ provides data confidentiality.

In IPSec, Internet Key Exchange $($IKEv$2)$ protocol operates in two phases.

In IPSec, Internet Key Exchange $($IKEv$2)$ protocol is built on Diffie$-$Hellman key exchange protocol.