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Exam 4A0-102 topic 1 question 31 discussion

Actual exam question from Alcatel-Lucent's 4A0-102
Question #: 31
Topic #: 1
[All 4A0-102 Questions]

Click the exhibit.

Router R1 is advertising prefix 192.168.1.0/27 with community "no-export. Which routers will receive an update for that prefix?

  • A. Router R2 only.
  • B. Routers R2 and R3 only.
  • C. Routers R2, R3 and R4 only.
  • D. Routers R2, R3, R4and R5.
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Suggested Answer: D 🗳️

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MariuszSRA335
2 months, 2 weeks ago
Correct answer is C From RFC 1997: NO_EXPORT (0xFFFFFF01) All routes received carrying a communities attribute containing this value MUST NOT be advertised outside a BGP confederation boundary (a stand-alone autonomous system that is not part of a confederation should be considered a confederation itself).
upvoted 1 times
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AmrMamdouh
1 year, 1 month ago
Correct Answer: C
upvoted 1 times
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ablongo
2 years, 10 months ago
Here are the 4 well known BGP communities: Internet: advertise the prefix to all BGP neighbors. No-Advertise: don’t advertise the prefix to any BGP neighbors. No-Export: don’t advertise the prefix to any eBGP neighbors. Local-AS: don’t advertise the prefix outside of the sub-AS (this one is used for BGP confederations). Correct Answer: C
upvoted 2 times
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ducpham
3 years, 7 months ago
no-export — All received routes that contain this community value must not be advertised outside a BGP confederation boundary (a nonconfederated AS is considered a single AS confederation). Correct answer is C
upvoted 4 times
snowblack
2 years, 12 months ago
yes, sure ;)
upvoted 1 times
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IgorMS79
4 years, 2 months ago
C is correct.
upvoted 4 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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