Discuss Cisco 300-820 Exam Topic 27 Question 111

A company identifies a fraudulent toil situation. An engineer reviews the Cisco UCM call detail records and discovers that fraudulent calls originate from a Cisco Expressway-C server and are then routed to a 10-digit PSTN number. What must be configured to limit incoming Expressway calls to the internal Cisco UCM range of extensions 5XXXX?

Acalling search space that contains all the partitions on the Unified Communications Manager SIP trunk to Expressway

Bcall policy rule from the DNS zone to allow a destination regex pattern of \d.*@abc.com

Cunique search rule with a regex pattern of [5]\d{4}@abc.com that targets the neighbor zone

Dcall policy rule from the DNS zone to allow a destination regex pattern of .*@abc.com

Suggested Answer: C

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23 comments · newest first

Candida 17 days ago

Exactly! C is the way to go for precise control.

Jutta 22 days ago

D seems too general as well. We need specificity here.

Sherell 27 days ago

I’m not sure about B. It feels irrelevant to the call routing issue.

Mozell 1 month ago

C makes sense. Regex can be powerful for this situation.

Candida 1 month ago

But A might be too broad. We need to limit it to 5XXXX.

Fausto 1 month ago

I’m leaning towards A. It seems to cover all partitions effectively.

Mica 2 months ago

I agree! I think option C is the best choice. It specifically targets the internal range.

Art 2 months ago

This question is tricky. I feel like it’s testing our understanding of call routing.

Ruth 2 months ago

But A might allow unwanted calls. C is safer.

Lizette 2 months ago

I’m leaning towards A too. It covers all partitions.

Barney 2 months ago

C is specific and effective. Regex helps narrow it down.

Launa 2 months ago

A seems too broad. We need to limit calls specifically.

Marg 3 months ago

I feel like C is the right choice. It targets the internal range directly.

Georgeanna 3 months ago

This question is tricky. I think option A makes sense.

Benedict 3 months ago

A is correct, but don't forget about the partitions!

Sherman 3 months ago

I disagree, D seems too broad for this situation.

Latanya 3 months ago

Wait, can we really limit calls like that? Sounds tricky.

Ashanti 3 months ago

I think C is the way to go, regex is key here!

Evan 4 months ago

Definitely A, you need that calling search space for proper routing.

Clare 4 months ago

I’m leaning towards option A because it seems to align with limiting calls to specific extensions, but I wish I had more clarity on the other options.

Mollie 5 months ago

I think the answer might be related to call policy rules, but I’m confused between options B and D. They both mention regex patterns, which makes it tricky.

Carry 6 months ago

I feel like we practiced a similar question where regex patterns were involved. Option C sounds familiar, but I can't recall the exact details.

Patrick 6 months ago

I remember we discussed something about calling search spaces in class. I think option A might be the right choice, but I'm not entirely sure.

Cisco 300-820 Exam - Topic 27 Question 111 Discussion