Which VPN technology is based on GDOI (RFC 3547)?
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A. B. C. D.C.
The correct answer to the question is C. GET VPN, as it is the VPN technology based on GDOI (Group Domain of Interpretation) as per RFC 3547.
Here is a brief explanation of the VPN technologies mentioned in the question:
A. MPLS Layer 3 VPN: MPLS Layer 3 VPN, also known as MPLS VPN, is a type of VPN that uses Multiprotocol Label Switching (MPLS) technology to provide secure and scalable connectivity between different sites or networks. MPLS VPNs use virtual routing and forwarding (VRF) to create separate routing tables for each customer or VPN instance, ensuring privacy and isolation of traffic between different VPNs.
B. MPLS Layer 2 VPN: MPLS Layer 2 VPN, also known as MPLS VPLS (Virtual Private LAN Service), is a type of VPN that extends the Layer 2 Ethernet connectivity between different sites or networks. MPLS VPLS uses MPLS labels to create virtual Ethernet bridges between different sites or networks, enabling customers to interconnect their Ethernet-based devices or networks as if they were connected to the same LAN.
C. GET VPN: Group Encrypted Transport VPN (GET VPN) is a type of VPN that uses GDOI to provide secure and scalable encryption of IP traffic between different sites or networks. GET VPN provides dynamic encryption of traffic flows based on group membership, ensuring that only authorized group members can access the encrypted traffic. GET VPN is particularly useful for large-scale VPN deployments where scalability, flexibility, and ease of management are critical.
D. IPsec VPN: IPsec VPN is a type of VPN that uses IPsec (Internet Protocol Security) protocol to provide secure and encrypted connectivity between different sites or networks. IPsec VPNs can be implemented in two modes: tunnel mode and transport mode. Tunnel mode encrypts the entire IP packet and encapsulates it within a new IP packet, while transport mode only encrypts the payload of the IP packet.
In summary, the VPN technology based on GDOI (RFC 3547) is GET VPN, which provides dynamic group-based encryption of IP traffic for secure and scalable VPN deployments.