Examine the following excerpt from the show ip ospf database asbr-summary command on
router R1 (RID 1.1.1.1). Which answer can be verified as definitely true based on this
output?
LS Type: Summary Links (AS Boundary Router)
Link State ID: 9.9.9.9 (AS Boundary Router address)
Advertising Router: 3.3.3.3
LS Seq Number: 8000000D
Checksum: 0xE43A
Length: 28
Network Mask: /0
TOS: 0 Metric: 100

A.
The output describes the contents of a Type 5 LSA.

B.
3.3.3.3 identifies a router as being the router performing redistribution.

C.
R1’s metric for its best route to reach the router with RID 9.9.9.9 is 100.

D.
The router with RID 3.3.3.3’s metric for its best route to reach the router with RID 9.9.9.9
is 100.

Explanation:
This command lists the output of Type 4 Summary ASBR LSAs. The LSID identifies the
redistributing ASBR (9.9.9.9). The advertising router is the ABR that created and flooded the
LSA (3.3.3.3), and the metric is the ABR’s best metric route to reach the ASBR.