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200-301 · Question #770
200-301 Question #770: Real Exam Question with Answer & Explanation
The correct answer is A: 172.16.1.0/26. The correct routing match is determined by the longest prefix match, where the most specific route takes precedence.
Submitted by devops_kid· Mar 5, 2026
Question
What is the correct routing match to reach 172.16.1.5/32?
Options
- A172.16.1.0/26
- B172.16.1.0/25
- C172.16.1.0/24
- Dthe default route
Explanation
The correct routing match is determined by the longest prefix match, where the most specific route takes precedence.
Common mistakes.
- B. While 172.16.1.0/25 contains 172.16.1.5, it is less specific than a /26 prefix.
- C. While 172.16.1.0/24 contains 172.16.1.5, it is less specific than both /25 and /26 prefixes.
- D. The default route 0.0.0.0/0 is the least specific route and is only used when no other more specific match is found.
Concept tested. Longest prefix match routing
Reference. https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13763-4.html
Topics
#IP routing#Longest prefix match#Subnetting
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