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Exam 300-820 topic 1 question 34 discussion

Actual exam question from Cisco's 300-820
Question #: 34
Topic #: 1
[All 300-820 Questions]


Refer to the exhibit. When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?

  • A. 13358 is replaced by 135, and then is sent to the local zone.
  • B. 13358 is replaced by 135 and remains in the same zone.
  • C. 13358 is replaced by 135, and then is sent to the traversal zone.
  • D. 13358 is sent directly to the traversal zone.
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Suggested Answer: C 🗳️

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Collabinski
9 months, 3 weeks ago
Selected Answer: D
Babasa09 is correct. I tested it on my Expressway and the match failed, so it would send it to the Traversal Zone. If you make the alias 1335 then there will be a successful match.
upvoted 1 times
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Babas09
1 year, 4 months ago
Answer D For the response to be C, regex should be 1?3+58
upvoted 3 times
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TestingAAgain
1 year, 5 months ago
None of the answers are correct. I dropped this all into the expression tester on an expressway in my lap, and it says that the pattern doesn't match. So, it would not be sent to the target zone, because it didn't match the pattern. The expressway would then continue to process the next search rule.
upvoted 2 times
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kljw5
1 year, 6 months ago
So am i to understand C is the correct answer then? as it will match 1335 then stop and replace the string with 135?? or is D correct as the 13358 as a whole string doesn't match??????
upvoted 1 times
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undertabler
1 year, 9 months ago
There is no match 13358 so this search rule will not be applied. I believe there is a typo.
upvoted 2 times
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tilo1988
1 year, 10 months ago
Based on LINK for Regex: https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2018/pdf/BRKCOL-2018.pdf * 0 or more repetitions of previous character or expression + 1 or more repetitions of previous character or expression ? 0 or 1 repetitions of previous character or expression Based on Website (https://www.regextester.com/10544) there are a few options which meets this Regex: 135, 1335, 13335, 1333335 1135, 11335, 113335, 11333335 no match for 13358: D is correct
upvoted 2 times
Krachowsky
7 months, 3 weeks ago
I think these are valid matches: 35,335,33335,33335 etc. 135,1335,13335,133335 etc. Because there is no way to get more then one 1 at the beginning. "?" says that the character before the "?" must be there 0 or 1 times.
upvoted 1 times
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ddrogi
2 years, 12 months ago
This is all wrong it should be 1358 and send to traversal zone
upvoted 1 times
virtu
2 years, 9 months ago
Hi, why you are saying that it should be 1358? picture has a replace behavior without any append or something like that
upvoted 2 times
Bazant
1 year, 10 months ago
Because 13358 will not be matched by shown regex. 1335 will be matched.
upvoted 1 times
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virtu
2 years, 9 months ago
Yep, i check pattern, and it will work if matching alias will be 1335 without 8 in the end of string
upvoted 1 times
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