Refer to the exhibit. R2 can reach Loopback222, but R1, SW1, and PC1 cannot communicate with 172.16.222.254.

R1 and R2 configurations are shown here:

Which EIGRP configuration command resolves the issue?

Refer to the exhibit. Reachability between servers in a network deployed with DHCPv6 is unstable. Which command must be removed from the configuration to make DHCPv6 function?

Refer to the exhibit. What does the imp-null tag represent in the MPLS VPN cloud?

Which two methods use IPsec to provide secure connectivity from the branch office to the headquarters office? (Choose two.)

IPv6 is enabled in the infrastructure to support customers with an IPv6 network over WAN and to connect the head office to branch offices in the local network. One of the customers is already running IPv6 and wants to enable IPv6 over the DMVPN network infrastructure between the headend and branch sites.
Which configuration command must be applied to establish an mGRE IPv6 tunnel neighborship?