Which two uses of the YANG data modeling language are true? (Choose two.)
Refer to the exhibit:
R1 is connected to two service providers and is under a DDoS attack Which statement about this design is true if uRPF in strict mode is configured on both interfaces'?
A regional MPLS VPN provider operates in two regions and wants to provide MPLS L3VPN service for a customer with two sites in these separate locations. The VPN provider approaches another organization to provide backbone carrier services so that the provider will connect to these two locations.
What is the next step?
When Cisco lOS XE REST API uses HTTP request methods what is the purpose of a PUT request?

Refer to the exhibit:
BGPsec is implemented on R1. R2. R3. and R4 BGP peering is established between neighboring autonomous systems Which statement about implementation is true?