MPLS VPNs

AC

MPLS VPNs (Multiprotocol Label Switching Virtual Private Networks) are a type of VPN that uses MPLS technology to securely and efficiently transport data between different sites or users. MPLS VPNs provide a way to connect geographically dispersed sites or users across different networks, while maintaining the security and privacy of the traffic being transported.

The two statements that are true about MPLS VPNs are:

A. With Layer 3 VPNs, the provider's routers participate in the customer's Layer 3 routing.

This statement is true. In a Layer 3 VPN, the provider's routers participate in the customer's Layer 3 routing. This means that the provider's routers are responsible for forwarding the customer's traffic between different sites or users, based on the customer's routing information. The provider's routers do not need to know the details of the customer's traffic, since the MPLS labels used to transport the traffic between sites are based on the customer's routing information.

B. MPLS VPNs are designed to run over private networks rather than the public Internet.

This statement is also true. MPLS VPNs are designed to run over private networks rather than the public Internet. This is because MPLS VPNs rely on the security and reliability of the underlying network to ensure the privacy and integrity of the traffic being transported. MPLS VPNs are typically used by large enterprises or service providers to connect different sites or users across different networks, and are designed to provide a secure and reliable way to transport data between these sites or users.

C. With Layer 2 VPNs, the provider does not participate in the routing of the customer's private IP traffic.

This statement is false. With Layer 2 VPNs, the provider does participate in the routing of the customer's private IP traffic. Layer 2 VPNs use MPLS technology to transport Ethernet frames between different sites or users, and the provider's routers are responsible for forwarding these frames between different sites or users based on the customer's MAC addresses. Since the provider's routers participate in the forwarding of the customer's traffic, they also participate in the routing of the customer's private IP traffic.

D. MPLS VPN tunnels are always encrypted.

This statement is false. MPLS VPN tunnels are not always encrypted. While MPLS VPNs can provide a secure and private way to transport data between different sites or users, they do not provide encryption by default. Encryption can be added to MPLS VPNs by using additional security measures such as IPsec or SSL/TLS, but this is not a default feature of MPLS VPNs.