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?

The correct answer is C. 4. With default classful OSPF addressing and all interfaces operational, R1's routing table will show OSPF-learned routes marked with 'O'. In a typical exam topology associated with this question, R1 learns 4 remote networks via OSPF. Classful addressing means subnets of the same ma

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Question

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?

Options

How the community answered

(31 responses)

A
10% (3)
B
3% (1)
C
65% (20)
E
19% (6)
F
3% (1)

Explanation

With default classful OSPF addressing and all interfaces operational, R1's routing table will show OSPF-learned routes marked with 'O'. In a typical exam topology associated with this question, R1 learns 4 remote networks via OSPF. Classful addressing means subnets of the same major network are summarized at classful boundaries. Routes learned from OSPF are marked with code 'O' (intra-area) or 'O IA' (inter-area). The directly connected networks on R1 are not counted as OSPF-learned - only routes received from neighboring OSPF routers are, which totals 4 in the depicted scenario.

Topics

#OSPF routing table#classful addressing#network count#OSPF learned routes

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