H12-821_V1.0 · Question #1131
If the route is by default, the routes imported by BGP will be automatically summarized. A. TRUE B. FALSE
The correct answer is B. FALSE. B is correct because BGP does not automatically summarize routes - it always advertises specific (classless) prefixes exactly as they are learned or redistributed, regardless of default settings. Unlike EIGRP (which historically enabled auto-summary by default) or RIPv1 (which…
Question
Options
- ATRUE
- BFALSE
How the community answered
(45 responses)- A29% (13)
- B71% (32)
Explanation
B is correct because BGP does not automatically summarize routes - it always advertises specific (classless) prefixes exactly as they are learned or redistributed, regardless of default settings. Unlike EIGRP (which historically enabled auto-summary by default) or RIPv1 (which summarizes at classful boundaries), BGP has no built-in auto-summarization behavior.
Why A is wrong: Auto-summarization is a feature of distance-vector IGPs like EIGRP and RIP, not BGP. BGP is a path-vector protocol designed for inter-AS routing where prefix precision is critical - silently summarizing routes would cause serious routing policy violations.
Memory tip: Think "BGP = Be Granular, Please." BGP is used between autonomous systems on the internet where losing prefix specificity could black-hole traffic for millions of users. It will never summarize without your explicit aggregate-address command.
Topics
Community Discussion
No community discussion yet for this question.