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Juniper JN0-363 Exam - Topic 8 Question 72 Discussion

ExhibitWhich prefix in the output shown in the exhibit is an external prefix injected by an OSPF router?
B) 172.18.1.0/24
A) 192.168.1.3
C) 192.108.1.4
D) 172.26.4.0730

Juniper JN0-363 Exam - Topic 8 Question 72 Discussion

Actual exam question for Juniper's JN0-363 exam
Question #: 72
Topic #: 8
[All JN0-363 Questions]

Exhibit

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

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Suggested Answer: B

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 configuration.


Juniper Networks Technical Documentation on OSPF

by Gilbert at May 30, 2026, 12:17 PM

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Craig
2 days ago
I feel like option C might be the right answer, but I'm not entirely sure if it's considered external.
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Matthew
7 days ago
I practiced a similar question where we had to identify OSPF prefixes, and I remember something about the 172.x range being internal.
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Norah
12 days ago
I think the external prefix is usually marked differently, but I can't remember how to identify it in the output.
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