Which statement is correct about learning remote host MAC addresses when your DCI is based on EVPN?

A customer reports a network outage at a branch office after users have reported intermittent Internet connectivity Upon further investigation, you determine that there is significant packet loss and that the majority of traffic on the WAN consists of DNS responses from many different sources.
In this scenario, which design consideration would reduce further occurrences with minimal chance of affecting valid traffic?

You are asked to provide a design proposal for a service provider network that will need to support both IPv4 and IPv6 traffic across your IPv4 core. You do not want to change the core design.
In this scenario, what are two solutions that you would implement at the peering edge? (Choose two.)

You work for a service provider that offers Layer 2 services. One of the customers is purchasing Layer 2 VPN services to interconnect several sites.
In this scenario, which two functions are provided by the PE router? (Choose two )

Your company is a large ISP that is upgrading their routers As part of the upgrade project, they want to implement a solution that will improve the effectiveness of their current RTBH solution for handling spoofed IP addresses coming across the WAN.
Which action would satisfy their requirement?