Which consideration must be made when designing a Cisco SD-Access fabric underlay?

An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

Refer to the exhibit.

Refer to the exhibit. An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?

Which two border nodes are available in the Cisco SD-Access architecture? (Choose two.)

What are two valid scaling techniques when an EIGRP network is designed that consists of more than 1000 routers? (Choose two.)