What can be done to Frame Relay to resolve split-horizon issues?(Choose two.)

The command show frame-relay map gives the following output:
Serial 0 (up): ip 192.168.151.4 dlci 122, dynamic, broadcast, status defined, active
Which statements represent what is shown?(Choose three.)

At which layer of the OSI model does PPP perform?

Which protocol is an open standard protocol framework that is commonly used in VPNs, to provide secure end-to-end communications?

Which two statistics appear in show frame-relay map output? (Choose two.)

What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?

Refer to the exhibit.

A network associate has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF. Which three of the interfaces shown in the exhibit will
participate in OSPF according to this configuration statement? (Choose three.)

What is the purpose of Inverse ARP?

Which command allows you to verify the encapsulation type (CISCO or IETF) for a Frame Relay link?

Which two statements about using the CHAP authentication mechanism in a PPP link are true? (Choose two.)