Exam 350-901 topic 1 question 213 discussion

A heterogeneous network of vendors and device types needs automating for better efficiency and to enable future automated testing. The network consists of switches, routers, firewalls, and load balancers from different vendors; however, they all support the NETCONF/RESTCONF configuration standards and the
YANG models with every feature the business requires. The business is looking for a buy versus build solution because they cannot dedicate engineering resources, and they need configuration diff and rollback functionality from day 1.
Which configuration management or automation tooling is needed for this solution?