Question 125 of 2,011
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300-410 Practice Question: The default BGP administrative distance for…
What is the default BGP administrative distance for routes learned from an external peer (eBGP) in Cisco IOS-XE?
Answer choices
Why each option matters
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Correct answer & explanation
✓
20
Cisco IOS-XE assigns eBGP routes an administrative distance of 20 by default.
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
In Cisco IOS-XE, the default administrative distance for eBGP routes is 20, which is lower than iBGP’s 200 and interior protocols like OSPF (110) or EIGRP (90). This value directly satisfies the stem’s constraint of “routes learned from an external peer (eBGP)” by ensuring eBGP-learned prefixes are preferred over those from most IGPs, reflecting the design principle that external paths should be trusted more than internal redistributions.
- ✗
200
Why it's wrong here
This is the default AD for iBGP routes.
- ✗
110
Why it's wrong here
This is the default AD for OSPF.
- ✗
120
Why it's wrong here
This is the default AD for RIP.
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Last reviewed: Jun 18, 2026
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