What is the default administrative distance of the OSPF routing protocol?

The correct answer is C. 110. OSPF has a default administrative distance (AD) of 110. Administrative distance is a rating of trustworthiness used when multiple routing sources provide paths to the same destination-lower is more trusted. The standard Cisco AD values are: Connected=0, Static=1, EIGRP internal=9

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Question

What is the default administrative distance of the OSPF routing protocol?

Options

A90
B100
C110
D120
E130
F170

How the community answered

(25 responses)

C
88% (22)
E
8% (2)
F
4% (1)

Explanation

OSPF has a default administrative distance (AD) of 110. Administrative distance is a rating of trustworthiness used when multiple routing sources provide paths to the same destination-lower is more trusted. The standard Cisco AD values are: Connected=0, Static=1, EIGRP internal=90, IGRP=100, OSPF=110, IS-IS=115, RIP=120, EIGRP external=170, Internal BGP=200. AD 90 belongs to EIGRP (internal). AD 100 belongs to IGRP. AD 120 belongs to RIP. AD 130 is not a standard protocol AD. AD 170 is EIGRP external routes. OSPF's AD of 110 means it is preferred over RIP (120) but less preferred than EIGRP internal routes (90).

Topics

#administrative distance#OSPF#routing protocol values

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