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Cisco 300-820 Exam - Topic 7 Question 100 Discussion

A call is sent by Cisco UCM to Expressway with a URI of 75080001@expc1a.pod8.test.lab. 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 75080001@conf.pod8.test.lab?
C) \1@conf.pod8\.test\.lab
A) \1@conf\.pod8.test.lab.@
B) \1@conf\.pod8\.test\lab.*
D) \1@conf\.pod8\.test.lab.!

Cisco 300-820 Exam - Topic 7 Question 100 Discussion

Actual exam question for Cisco's 300-820 exam
Question #: 100
Topic #: 7
[All 300-820 Questions]

A call is sent by Cisco UCM to Expressway with a URI of 75080001@expc1a.pod8.test.lab. 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 75080001@conf.pod8.test.lab?

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Suggested Answer: C

by Dahlia at Jul 13, 2025, 07:04 AM

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Talia
8 months ago
Wait, why is there a dot in the replacement? Seems off.
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Chan
9 months ago
Definitely agree, option C looks right!
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Hubert
9 months ago
The replacement string should be \1@conf.pod8.test.lab
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Floyd
9 months ago
I’m not sure about that, can someone explain the pattern?
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Nieves
9 months ago
I thought it would be option A, but C makes sense too.
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Truman
9 months ago
I’m leaning towards option A, but I’m not confident about whether the backslash before "conf" is necessary or not.
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Shelton
10 months ago
I feel like option C looks familiar, but I can't recall if we need to include the escape characters for the dots in the replacement string.
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Jina
10 months ago
I remember practicing a similar question where we had to rewrite URIs, and I think it was important to use the right escape characters.
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Alisha
10 months ago
I think the replacement string should capture the user part correctly, but I'm not sure if I remember the right syntax for the dot escaping.
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Shelba
10 months ago
Ah, I see what's going on here. The pattern string is using a capture group to isolate the username part, and the replacement string is referencing that captured value with \1. Option C looks like the correct choice.
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Francene
11 months ago
This seems straightforward to me. The pattern string is clearly matching the entire URI, and the replacement string just needs to substitute the domain part with the new value. I'd go with option C.
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Angelica
11 months ago
I'm a bit confused by the syntax of the replacement string. Do I need to include the full domain, or just the part that's changing? I'm not sure if I fully understand how the regex replacement works in this case.
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Theron
11 months ago
Okay, let me break this down step-by-step. The pattern string is matching the full URI, and I need to replace the domain part with "conf.pod8.test.lab". I think option C is the right answer.
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Berry
11 months ago
Hmm, this looks like a tricky regex question. I'll need to carefully analyze the pattern string and think through the desired output to determine the correct replacement string.
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Rashida
1 year ago
My eyes are crossing just looking at these regex patterns. I'm going to close my eyes, point at the screen, and hope for the best. C it is!
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Maurine
11 months ago
I think it's C) \\1@conf.pod8.test.lab
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Dierdre
1 year ago
Hmm, this question is making my head spin. I'll just go with C and pray that's the correct answer. At least it's not multiple choice with 10 options!
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Bambi
1 year ago
This is a tricky one, but I'm confident that C is the right answer. Can't wait to see the explanations after the exam!
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Jolanda
1 year ago
Option D looks interesting, but the exclamation mark at the end seems a bit odd. I'm going with C as the safest choice.
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Blythe
12 months ago
I think C is the safest choice.
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Jose
1 year ago
I think the correct answer is C. The pattern string \1@conf\.pod8\.test\.lab seems to match the given URI and the replacement string \1@conf.pod8\.test\.lab would rewrite the call as required.
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Rutha
12 months ago
No, it's actually C) \\1@conf.pod8\\.test\\.lab.!
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Janine
1 year ago
I think it's A) \\1@conf\\.pod8\\.test.lab.@
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Dean
1 year ago
I agree, C) \\1@conf.pod8\\.test\\.lab seems like the correct answer.
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Dottie
1 year ago
I'm not sure, but I think B) \\1@conf\\.pod8\\.test\\lab.* could also be a possible answer
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Chantell
1 year ago
I disagree, I believe the correct answer is C) \\1@conf.pod8\\.test\\.lab
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Jennie
1 year ago
I think the answer is A) \\1@conf\\.pod8.test.lab.
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