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

Explanation:
It already knows about its directly connected ones, only those not directly connected

are “Learned by OSPF”.
OSPF as a link state routing protocol (deals with LSAs rather than routes) does not auto
summarize (doesn’t support “auto-summary”).So learned route by OSPF are followed
172.16.2.64/26
172.16.2.228/30
172.16.2.232/30
172.16.3.0/24