Home » Cisco » 100-101 » How many networks will be in the routing table of R1 that are indicated to be learned by OSPF?
OSPF is configured using default classful addressing. With all routers and interfaces operational, how many networks will be in the routing table of R1 that are indicated to be learned by OSPF?
A. 2
B. 3
C. 4
D. 5
E. 6
F. 7
Correct Answer: C
Explanation/Reference:
Explanation:
Although OSPF is configured using default classful addressing but OSPF is a link-state routing protocol so it will always send the subnet mask of each network in their advertised routes. Therefore R1 will learn the the complete subnets. Four networks list below will be in the routing table of R1:
+ 172.16.2.64/30
+ 172.16.2.228/30
+ 172.16.2.232/30
+ 172.16.3.0/24
Note: Other networks will be learned as “Directly connected” networks (marked with letter “C”)
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