REFER TO THE EXHIBIT. A NETWORK ADMINISTRATOR HAS CONFIGURED R1 AS...
19. Refer to the exhibit. A network administrator has configured R1 as shown, and all interfaces are functioning correctly. A
ping from R1 to 172.16.1.1 fails. What could be the cause of this problem?
The serial interface on R1 is configured incorrectly.
The default route is configured incorrectly.
The default-information originate command must be issued on R1.
Autosummarization must be disabled on R1.