Question-with network topology, it is OSPF network is redistributing RIP. Question-is how to summarize those route.
A. (config-router)# summary-address ……..on ASBR
B. (config-router)# area … range…….. on ASBR
C. (config-router)# summary-address ……..on ABR
D. (config-router)# area … range…….. on ABR
Answer is A only; for OSPF redistributing RIP(external route), summarize has to use summary-address on ASBR
Area range command only involve internal ospf route; refer below document
http://www.ciscopress.com/articles/article.asp?p=2294214&seqNum=3
AD
http://www.ciscopress.com/articles/article.asp?p=2294214&seqNum=3
OSPF offers two methods of route summarization:
Summarization of internal routes performed on the ABRs
Summarization of external routes performed on the ASBRs