hardMultiple Choice
300-410 Practice Question: In BGP, what is the default administrative…
In BGP, what is the default administrative distance for routes learned from an eBGP peer?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
20
The default administrative distance for eBGP is 20, while iBGP has a default of 200.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
20
Why this is correct
External BGP routes carry a default administrative distance of 20 in Cisco IOS, making them more trusted than internal BGP (200) and OSPF (110). This value satisfies the stem's requirement for the default distance assigned to routes learned from an eBGP peer, reflecting eBGP's higher preference.
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200
Why it's wrong here
eBGP routes default to administrative distance 20, so 200 is incorrect. That number belongs to iBGP, which is why it is tempting when confusing internal and external BGP sessions. 200 applies to routes learned from an iBGP peer, not an eBGP peer.
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120
Why it's wrong here
eBGP's administrative distance is 20, not 120. The value 120 is assigned to RIP, so it is tempting when recalling interior gateway protocol distances. It would be the correct figure only for RIP-learned routes competing with other sources in the routing table.
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110
Why it's wrong here
eBGP routes carry a default administrative distance of 20, so 110 is wrong. That value belongs to OSPF, which is why it appears plausible to anyone recalling common AD tables. 110 would apply when choosing between OSPF and other protocols, not for external BGP-learned prefixes.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.