Which automation tool uses the master/minion model for changes?

What are two features used to enable high availability? (Choose two.)

You are asked to evaluate a WAN design for a corporation with a focus on cost, security, and the ability to have direct adjacencies between your remote sites.
Which two solutions would meet these requirements? (Choose two.)

In which network location should an external DNS server be placed?

What are two requirements that every RFP response should include? (Choose two.)