Refer to the exhibit.

Router 4, which is an HP Comware router, redistributes Routing Information Protocol (RIP) routes into Open
Shortest Path First (OSPF) process 1. Router 4 has several dozen IP routes, and the network administrator
wants to minimize the number of external routes throughout the entire OSPF AS. How can the administrator
meet this requirement?

A.
Create an ABR summary for the RIP routes on Router 2 and Router 3.

B.
On all OSPF devices, configure all OSPF areas, including area 0, as stub areas.

C.
On all OSPF devices in area 0, set area 0 as a not-so-stubby-area (NSSA)

D.
Create an ASBR summary for the RIP routes on Router 4.

Explanation:
Use the asbr-summary command to configure a summary route.
Use the undo asbr-summary command to remove a summary route.
No ASBR route summarization is configured by default.
With the asbr-summary command configured, an ASBR summarizes redistributed routes that fall into the
specified address range into a single route. If the ASBR resides in an NSSA area, it advertises the summary
route in a Type-7 LSA into the area.
04-OSPF Commands
http://www.h3c.com/portal/Technical_Support___Documents/Technical_Documents/Security_Products/
H3C_SecPath_F1000-E/Command/Command/H3C_SecPath_High-End_CM(F3169_F3207)-
5PW106/04/201109/725613_1285_0.htm