Implementing Cisco IP Switched Networks (SWITCH v2-0) (#256)

Which three statements about VRRP are true? (Choose three.)

Authentication commands must be entered under the interface.
It sends advertisements to multicast address 224.0.0.9.
It supports MD5 and IP sec authentication.
It can use an interface IP address as the virtual IP address.
It sends advertisements to multicast address 224.0.0.18.
It is a Cisco proprietary protocol.