On Cisco IOS XR software, what are the four valid address-family configuration command options
in static route configuration mode? (Choose four.)
A.
address-family ipv4 unicast
B.
address-family ipv6 unicast
C.
address-family ipv4 multicast
D.
address-family ipv6 multicast
E.
address-family vpnv4
F.
address-family vpnv6
Explanation:
Static Routing Commands on Cisco IOS XR Software
address-family (static)
To enter various address family configuration modes while configuring static routes, use the address-family command in the appropriate configuration mode. To disable support for an address family, use the no form of this command.
address-family { ipv4 | ipv6 } { unicast | multicast }
http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-0/routing/command/reference/rr40crs1book_chapter9.html
A.
address-family ipv4 unicast
B.
address-family ipv6 unicast
C.
address-family ipv4 multicast
D.
address-family ipv6 multicast