Explanation : Cisco's Group Encrypted Transport VPN (GETVPN) introduces the concept of a trusted group to eliminate point-to-point tunnels and their associated overlay routing. All group members (GMs) share a common security association (SA), also known as a group SA. This enables GMs to decrypt traffic that was encrypted by any other GM. GETVPN provides instantaneous large-scale any-to-any IP connectivity using a group IPsec security paradigm. Reference: https://www.cisco.com/c/dam/en/us/products/collateral/security/group-encrypted-transport-vpn/ GETVPN_DIG_version_2_0_External.pdf