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Exam HPE6-A73 topic 1 question 77 discussion

Actual exam question from HP's HPE6-A73
Question #: 77
Topic #: 1
[All HPE6-A73 Questions]

Examine the network topology.

The network is configured for OSPF with the following attributes:
✑ Core1 and Core2 and ABRs
✑ Area 1 has 20 networks in the 10.1.0.0/16 range
✑ Area 0 has 10 networks in the 10.0.0.0/16 range
✑ Area 2 has 50 networks in the 10.2.0.0/16 range
✑ The ASBR is importing a static route into Area 1
✑ Core2 has a summary for Area 2: area 0.0.0.2 range 10.2.0.0/16 type inter-area
Here is the OSPF configuration performed on Core1:

Based on the above information, what is correct?

  • A. ISP 1 is not reachable from any area.
  • B. Core1 has received one type 5 LSA from the ASBR.
  • C. Area 0 has 81 routes
  • D. Area 1 has 23 routes
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by spillo3000 at Sept. 18, 2022, 7:58 a.m.

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spillo3000
Highly Voted 2 years, 1 month ago
ISP 1 is not reachable from any area
upvoted 6 times
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johnhenri
Most Recent 6 months, 3 weeks ago
Selected Answer: A
A is correct: From learning book ACSP "Advanced OSPF" : "Internal routers in stub area : Do not support route redistribution (local external routes). ABRs for stub area : Suppress Type 5 LSAs (external route from other areas) & inject a default route" B is incorrect because ABRs for stub area : Suppress Type 5 LSAs C is incorrect because there is ABR route aggregation configuration for core1 area 1 & core2 area 2
upvoted 2 times
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SeidorBruno
1 year, 3 months ago
Selected Answer: A
Page 395 Study Guide: To e l i m i n a t e e x t e r n a l r o u t e s a n d a d v e r t i s e m e n t s f r o m a n a r e a , d e f i n e t h e a r e a a s a s t u b a r e a . ABRs for stub areas do not forward Type 4 or Type 5 LSAs into those areas, and internal routers in those areas do not generate or accept them. [Aruba Networks]
upvoted 3 times
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SahilERT
1 year, 4 months ago
ISP can reach out to area1 via default route. Correct option D
upvoted 1 times
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theklee
1 year, 10 months ago
Stub area does not allow type 5 LSA or ASBR. Answer is A, ISP cannot be reached by any area
upvoted 2 times
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theklee
1 year, 10 months ago
Stub area does not allow type 5 LSA or ASBR
upvoted 1 times
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Alialo
1 year, 11 months ago
Selected Answer: D
i would like to choose D, but not totally sure about that. ASBR importing a static route into Area 1, not LSA5. 20 local+1 LSA3+1 Static from ASBR+1 default from Area 0= 23 routes
upvoted 2 times
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E_Nick
2 years ago
Selected Answer: A
To eliminate external routes and advertisements from an area, define the area as a stub area.
upvoted 4 times
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