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Exam 300-410 topic 1 question 18 discussion

Actual exam question from Cisco's 300-410
Question #: 18
Topic #: 1
[All 300-410 Questions]


Refer to the exhibit. Which subnet is redistributed from EIGRP to OSPF routing protocols?

  • A. 10.2.2.0/24
  • B. 10.1.4.0/26
  • C. 10.1.2.0/24
  • D. 10.2.3.0/26
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by oasc at April 19, 2021, 2:31 p.m.

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David98898998
Highly Voted 2 years ago
Selected Answer: A
Tested on GNS3. It's stupid as hell and I feel dumber for doing it, but A is definitely the answer.
upvoted 6 times
David98898998
2 years ago
Route-maps will not match on deny ACLs or deny statement prefix-lists. They will ignore them. Sequence 5 of the route map is entirely ignored.
upvoted 2 times
HungarianDish_111
2 years ago
I agree. Prefixes from network 10.1.0.0/16 with length /16-24 are not evaluated in seq 5, but are denied by implicit deny-all at the end of the route-map.
upvoted 4 times
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bf10690
Most Recent 8 months, 4 weeks ago
Selected Answer: A
A is correct. B, C and D would get blocked because what matters is the permit statement in the route map, and it only allows IPs/networks that fit inside this range: 10.2.0.0/18 and that has a subnet mask of 24 or lower. B and C are not within the range (since they have 10.1 in them) and 10.2.3.0/26 has a subnet mask longer than 24.
upvoted 2 times
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Audiunt
9 months ago
Its a strange questions as 10.2.2.0/24 is directly-connected and there is nothing which shows in which routing protocol the connected networks are redistributed. All other networks are from the RIP domain, so no redistribution at all?
upvoted 2 times
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26307ae
10 months, 3 weeks ago
Clear that the 10.1 network is filtered with the emplicit deny at the end of the route map. But how does /26 go through as the prefix list is for le 24?
upvoted 1 times
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[Removed]
11 months, 1 week ago
Selected Answer: A
A is correct ip prefix-list OSPF-TAG-PRF-1 seq 5 permit 10.2.0.0/18 le 24 the only one match it is 10.2.2.0/24
upvoted 2 times
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Iarn
3 years, 1 month ago
Bit confused why every has A given the logic shown for matching answer A 10.2.3.0/26 would also match?!
upvoted 2 times
Iarn
3 years, 1 month ago
On second thought le 24 is /0-24 thus /26 is greater
upvoted 4 times
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xziomal9
3 years, 1 month ago
Selected Answer: A
The correct answer is: A
upvoted 1 times
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thanh123
3 years, 2 months ago
I'm with A, too
upvoted 1 times
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Networkingguy
3 years, 4 months ago
Selected Answer: A
A is correct here
upvoted 1 times
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ciscomicha
3 years, 5 months ago
Selected Answer: A
I'm with A. Given answer. It is the only route that match an route-map permit statement because it matches the second prefix-list
upvoted 1 times
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error_909
3 years, 9 months ago
The given answer is correct
upvoted 1 times
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beatido
3 years, 9 months ago
Its clearly A
upvoted 1 times
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RTE
3 years, 11 months ago
A is right, permit statement in second route-map and permit int prefix-list with network length <=24, implicit deny at the end of r-map
upvoted 2 times
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azharken
4 years ago
wrong question both prefix lists are permitting
upvoted 2 times
ichweissauchnicht
3 years, 6 months ago
That's true (deny in first acl and deny in route-map => permit). This question is strange...
upvoted 1 times
JOKERR
3 years, 6 months ago
No. Deny in the ACL or Prefix list mean that entry is not affected by the route map. Deny means let the route pass. Permit means route map is permitted to take action on that entry.
upvoted 3 times
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oasc
4 years, 2 months ago
C is the one correct
upvoted 4 times
Pb1805
4 years, 1 month ago
What about A?
upvoted 3 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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