Group Encrypted Transport VPN (GET VPN) is a tunnel-less VPN technology designed for securing private MPLS and WAN networks.
Unlike traditional IPsec VPNs that use point-to-point tunnels, GET VPN encrypts traffic end-to- end without creating tunnels, maintaining the original routing path.Key characteristics of GET VPN:
Tunnel-less: It encrypts traffic without encapsulating it in GRE or IPsec tunnels.
Scalable: Suitable for large networks with multiple sites.
Group Encryption Keying: Uses GDOI (Group Domain of Interpretation) to distribute encryption keys to all members.
Preserves QoS and Routing: Since no tunnels are created, original QoS markings and routing decisions remain intact.

https://www.cisco.com/c/en/us/support/docs/security-vpn/webvpn-ssl-vpn/119417-config-asa-00.html#anc15:~:text=simultaneous%2Dlogins%2020-,WebVPN%20Clients%20Cannot%20Hit%20Bookmarks%20and%20is%20Grayed%20Out,-Problem

The IKEv2 CREATE_CHILD_SA packet is used to establish a new security association (SA) between two peers. This packet contains the details of the exchange, including the traffic selectors, the cryptographic algorithms and keys to be used, and any other relevant information

HSRP (Hot Standby Router Protocol). HSRP is a Cisco proprietary protocol that provides stateful failover for IPsec virtual private networks (VPNs). It is used to create a virtual router in order to provide redundancy in the event of an IPsec VPN failure. HSRP works by assigning a single primary router to manage the connection and forwarding traffic to the secondary router if the primary router fails.