Which function does the Cisco SD-Access intermediate node perform?

A router running ISIS is showing high CPU and bandwidth utilization. An engineer discovers that the router is configured as L1/L2 and has L1 and L2 neighbors. Which step optimizes the design to address the issue?

Refer to the exhibit.

Refer to the exhibit. Which method must an architect use to provide connectivity between the mail servers?

Which consideration must be taken into account when using the DHCP relay feature in a Cisco SD-Access Architecture?

An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?