Router R1 currently has no configuration related to IPv6 or IPv4. The following configuration
exists in a planning document, intended to be used to copy/paste into
Router R1 to enable RIPng and IPv6 on interfaces F0/0 and S0/0/0. No other related
configuration exists. Which of the following is true about RIPng on R1 after this configuration
has been pasted into R1?
ipv6 unicast-routing
interface f0/0
ipv6 rip one enable
ipv6 address 2000::1/64
interface s0/0/0
ipv6 address 2001::/64 eui-64
ipv6 rip one enable

A.
RIPng will be enabled on no interfaces.

B.
RIPng will be enabled on one interface.

C.
RIPng will be enabled on two interfaces.

D.
RIPng will advertise about prefixes connected to S0/0/0 and F0/0, but only send Updates
on one interface.

Explanation:
That the configuration will be copied/pasted into a router means that the order of the
commands matters. In this case, that the ipv6 rip one enable command precedes the ipv6
address command on interface f0/0 means that IOS will reject the first of these commands,
therefore not enabling RIPng on F0/0. The correct order listed under S0/0/0 means that
RIPng will be enabled on S0/0/0. As a result, RIPng on R1 will advertise about S0/0/0’s
connected IPv6 prefixes, and send Updates on S0/0/0, but will do nothing related for F0/0.