Exam 300-820 topic 1 question 48 discussion

Actual exam question from Cisco's 300-820

Question #: 48
Topic #: 1

A call is sent by Cisco UCM to Expressway with a URI of [email protected]. If (7508`¦)@expc1a\.pod8\.test\.lab.* is the pattern string, what would be the replacement string of the transform in Expressway to re-write the call so that it becomes [email protected]?

A. \1@conf\.pod8.test.lab.@
B. \1@conf\.pod8\.test\lab.*
C. \[email protected]\.test\.lab
D. \1@conf\.pod8\.test.lab.!

Show Suggested Answer

Suggested Answer: C 🗳️

by rob79 at Oct. 17, 2021, 7:23 p.m.

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OZtemp

7 months, 2 weeks ago

Shouldn't the answer be: \1@conf\.pod8\.test\.lab instead of \[email protected]\.test\.lab? Why isn't there a slash before the period beginging with pod8?

upvoted 1 times

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Panda_man

1 year, 7 months ago

Selected Answer: C

C is correct

upvoted 2 times

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TestingAAgain

2 years, 11 months ago

Actually, none of the answers are valid. I plugged this into the expression tester on my Expressway C in my lab, and the alias does not match the regex pattern.

upvoted 1 times

TestingAAgain

2 years, 11 months ago

The problem is the apostrophe pipe ( '| ). The apostrophe isn't a valid character in REGEX, and the pipe specifies a logical OR. BUT, assuming the regex pattern was: (7508.*)@expc1a\.pod8\.test\.lab, then the answer would be C as verified by the expression tester. C doesn't work due to the unescaped period in the string, and the others add extra unwanted characters to the output.

upvoted 1 times

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rob79

3 years, 7 months ago

Shouldn't this be B?

upvoted 1 times

rob79

3 years, 4 months ago

Sorry ignore this C is correct

upvoted 3 times

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Exam 300-820 topic 1 question 48 discussion

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