Cisco ENCOR Practice Exam 2025 – All-in-One Comprehensive Guide to Mastering Enterprise Network Core Technologies!

The GDOI (Group Domain of Interpretation) protocol plays a critical role in GET VPN (Group Encrypted Transport VPN) by serving as the key management protocol for group communications. In the context of secure communications, especially within a group framework, effectively managing encryption keys is vital. GDOI facilitates the distribution and management of symmetric keys to all members of a defined group, thus allowing them to encrypt and decrypt traffic securely.

This key management capability ensures that all group members can communicate securely and efficiently while maintaining the confidentiality and integrity of the data being transmitted. By handling the assignment and renewal of keys, GDOI enhances the overall security posture of the GET VPN architecture, ensuring that all participants can rely on a consistent and trusted method for securing their communications.

Other functionalities suggested in the remaining choices do not align with the primary purpose of GDOI. For instance, while establishing a VPN tunnel and managing routing are essential elements of a VPN, these functions are not performed by GDOI itself. Additionally, verifying user identities is a separate aspect that pertains more to authentication protocols rather than the key management focus of GDOI.