Referring to the exhibit. Which prefix in the output shown in the exhibit is an external prefix injected by an OSPF router?

The correct answer is B. 172.18.1.0/24. In the OSPF routing table output, prefixes are marked with different route types. An external prefix injected into OSPF is marked as 'Ext' (External) followed by a number that indicates whether it's an E1 or E2 route. The prefix 172.18.1.0/24 is marked as Ext2, which indicates…

OSPF

Question

Exhibit

Options

A192.168.1.3
B172.18.1.0/24
C192.108.1.4
D172.26.4.0730

How the community answered

(63 responses)

A
17% (11)
B
70% (44)
C
10% (6)
D
3% (2)

Explanation

In the OSPF routing table output, prefixes are marked with different route types. An external prefix injected into OSPF is marked as 'Ext' (External) followed by a number that indicates whether it's an E1 or E2 route. The prefix 172.18.1.0/24 is marked as Ext2, which indicates that it is an external route that has been redistributed into OSPF from another routing protocol or static

Topics

#OSPF external routes#LSA types#prefix identification#show ospf route

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