An architect must address sustained congestion on the access and distribution uplink of network.
QoS has already been implemented and optimized, but it is no longer effective in ensuring optimal network performance.
Which two solutions should the architect use to improver network performance? (Choose two)

Which solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?

Drag and drop the characteristics from the left onto the YANG modules they describe on the right. Not all options are used.

Refer to the exhibit. EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4.
When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

Refer to the exhibit.

An architect is designing a routing solution for a company. The new design will add a circuit routers C and D to protect against loss of connectivity to 10.0.4.0/24 during a link failure between routers B and D. Which solution must the architect choose?