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Exam 350-401 topic 1 question 121 discussion

Actual exam question from Cisco's 350-401
Question #: 121
Topic #: 1
[All 350-401 Questions]

Refer to the exhibit.

Which IP address becomes the active next hop for 192.168.102.0/24 when 192.168.101.2 fails?

  • A. 192.168.101.10
  • B. 192.168.101.14
  • C. 192.168.101.6
  • D. 192.168.101.18
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by CBlu at June 23, 2020, 11:20 a.m.

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DJOHNR
Highly Voted 4 years, 4 months ago
An empty LocPrf is set at 100, the highest number wins for next hop selection. So the two values of 80 for LocPrf can be ignored. That means you can thow away .6 and .14. This leaves .18 and .10 Next look at the Path. Shortest path wins! Between .18 and .10, .18 has a shorter path, 64517i vs 64515 64515i The right answer is D
upvoted 80 times
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CBlu
Highly Voted 4 years, 5 months ago
Just to clarify: The empty "local preference" implies it's a local preference of 100. And the highest local preference wins, hence the 2 entries with local pref. 80 can be ignored.
upvoted 50 times
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[Removed]
Most Recent 6 months, 2 weeks ago
Selected Answer: D
D is correct WLAM Weight (hightest) Local Preference (default 100) (hightest) AS Path (lowest) Metric (lowest)
upvoted 6 times
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Caradum
2 years ago
Selected Answer: D
D is correct, as many explained it correctly here.
upvoted 1 times
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Eddgar0
2 years, 7 months ago
Selected Answer: D
AS have higer loca preferences and shorter ASPATH
upvoted 1 times
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Violator
2 years, 9 months ago
This question is still asked. Passed today.
upvoted 2 times
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gomezdiazfm
2 years, 10 months ago
B. 192.168.101.14 si the correct answer. LocalPref is 100 when is a iBGP peer, but in the exhibit we have a eBGP peer.
upvoted 2 times
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youtri
3 years ago
the order of the attributes is: W-L-A-M 1-Weight (the hightest wins) 2-Local preference (default value =100) (the hightest wins) -3As path (the lowest AS path wins) 4-Metric (the lowest wins)
upvoted 12 times
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Hack4
3 years, 5 months ago
right answer
upvoted 2 times
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davdtech
3 years, 8 months ago
Weight, local prf, Originate,AS , Origin MED it's very useful to use D is correct
upvoted 3 times
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networker
4 years, 3 months ago
ok thanks
upvoted 1 times
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mbustani
4 years, 4 months ago
D is correct. lower metric wins. default 100 higher local preference wins. default 100 so, by elimination, it remains only .14 and .18. first comparison is metric and after that local preference. both .14 and .18 have the same metric. So, let's compare local preference: .14 = 80 and .18 = 100 (default). .18 is the correct. letter D.
upvoted 6 times
Burik
1 year, 6 months ago
No. Your answer is correct, but your reasoning is wrong. BGP Metric [MED] defaults to 0 and it's checked after Weight, Local Preference, and AS path length, in that order.
upvoted 2 times
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chalosca
4 years, 4 months ago
https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13753-25.html 18 and 10 has 100 (loc_pref) / they are both 'i' / shortest AS_PATH wins
upvoted 2 times
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C (25%)
B (20%)
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