Skip to content

Cisco 400-051

CCIE Collaboration Written

Verified practice questions with detailed answers, clear explanations, and community discussion.

  • 939

    questions

  • 1 day ago

    last updated

  • 4.8/5

    overall rating

Question 1 of 939

What is the maximum number of call-processing subscribers in a standard deployment of a Cisco Unified Communications Manager Session Management Edition cluster?

Answer choices
Show answer

Correct answer: D

There is no deployment difference between CUCM & CUCM session management Edition cluster. The only difference is that CUCM SME is designed to support a large number of trunk to trunk connections. Thus, 8 subscribers.

Question 2 of 939

Which device is the initiator of a StationInit message in a Cisco Unified Communications Manager SDI trace?

Answer choices
Show answer

Correct answer: D

Station Init means that an inbound Transmission Control Protocol (TCP) message from a Skinny station reached CallManager. A Skinny station is any endpoint that uses the Skinny protocol to communicate with CallManager.

Question 3 of 939

Which H.245 information is exchanged within H.225 messages in H.323 Fast Connect?

Answer choices
Show answer

Correct answer: B

With the standard H.245 negotiation, the two endpoints need three round-trips before they agree on the parameters of the audio/video channels (1. master/slave voting, 2. terminal capability set exchange, and finally, 3. opening the logical channels). In certain situations and especially with high-latency network links, this can last too long and users will notice the delay.

Question 4 of 939

What is the minimum number of TCP sessions needed to complete a H.323 call between two H.323 gateways using slow start?

Answer choices
Show answer

Correct answer: C

H.323 has two modes of operation: slow start and fast start. The initiation of a call may proceed in a slow start or fast start in H.323. In a slow start, H.323 signaling consists of Setup, Call Proceeding, Alerting, and Connect steps. After these steps, the H.245 media negotiation is performed. When a call is initiated in H.323 fast start, the H.245 media negotiation is performed within the initial Setup message. With slow start, multiple TCP connections are needed for an H.323 call, such as one H.225 signaling channel and one H.245 signaling channel if required (minimum of these two).

Question 5 of 939

Which element was added to H.225 messages to enable Fast Connect in H.323 version 2?

Answer choices
Show answer

Correct answer: A

Fast start allows for H323 media connections to be started at the beginning of a call. This is helpful for ringback scenarios, and also reduces the amount of time calls take to establish media. H245 is still negotiated later, but the actual media can be done earlier through H225 messages.

934 questions still locked

Your preview covered the first 5 questions. Unlock the rest to see every explanation and discussion thread, updated weekly

View plans

Choose your plan

Single payment · No subscription · No hidden fees

Standard

For a focused sprint before your exam date

$25USD

30 days of access, single payment

  • All 939 questions unlocked
  • Detailed answer explanations
  • Community discussions and votes
  • Weekly question updates
  • Printable PDF download
  • 100% refund if you do not pass

Premium

Extra runway, the PDF, and the refund guarantee

$35$60USD

90 days of access, single payment

Printable PDF download

Save every question as a PDF for offline study or printing.

  • All 939 questions unlocked
  • Detailed answer explanations
  • Community discussions and votes
  • Weekly question updates

Full refund if you do not pass

Send us your exam result and we refund the purchase.

Stories from the certified

Charles Sirois
Canada
As this was my first certification exam, I was understandably nervous about what to expect. These study materials made the preparation process much easier, and many of the questions closely reflected those on the actual exam.
Lance Chambers
United States
Wasted about a month going through the free dump sites scattered all over reddit, half the answers were wrong and the other half were for a version of the exam that doesn't even exist anymore. Eventually gave in and paid the small fee here, and the difference was night and day.
Alisha Kelly
Italy
Honestly, I had already gone through the official documentation quite thoroughly, but still didn't feel fully confident going in. This helped things finally click for me. I realized I knew the material, but just hadn't connected all the pieces yet.
Casper Claassen
Netherlands
Used this along with Microsoft Learn and the combo worked really well. The practice questions made the stuff I'd read actually stick. Passed first attempt, no complaints from me.
Gabriele Ghesla
Italy
The content is accurate and clearly presented, and it's more affordable than competitors. The team has been incredibly responsive whenever I've had an issue, and they've been open to small changes that improve the platform.
Charles Sirois
Canada
As this was my first certification exam, I was understandably nervous about what to expect. These study materials made the preparation process much easier, and many of the questions closely reflected those on the actual exam.
Lance Chambers
United States
Wasted about a month going through the free dump sites scattered all over reddit, half the answers were wrong and the other half were for a version of the exam that doesn't even exist anymore. Eventually gave in and paid the small fee here, and the difference was night and day.
Alisha Kelly
Italy
Honestly, I had already gone through the official documentation quite thoroughly, but still didn't feel fully confident going in. This helped things finally click for me. I realized I knew the material, but just hadn't connected all the pieces yet.
Casper Claassen
Netherlands
Used this along with Microsoft Learn and the combo worked really well. The practice questions made the stuff I'd read actually stick. Passed first attempt, no complaints from me.
Gabriele Ghesla
Italy
The content is accurate and clearly presented, and it's more affordable than competitors. The team has been incredibly responsive whenever I've had an issue, and they've been open to small changes that improve the platform.
Morgan Farmer
United Kingdom
I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
Remi Nuyts
United States
Passed ITIL 4 Foundation with 87%. Material was enough by itself.
Archie Hopkins
United States
I had a smooth experience from start to finish. Access was available right away, no technical issues, which made it easy to get started. The content felt relevant and aligned well with what I was looking for.
Nancy Mcbride
United States
Does what it says it does. Content felt solid, nothing confusing to navigate and I didn't run into any weird issues. I been putting off scheduling the exam for a while and going through this gave me enough confidence to finally book it and pass.
Neil Savage
United States
A very quick response was received via email when a link issue occurred. The study materials provided were high quality and extremely helpful. I was able to complete the test successfully. Many thanks for the excellent support.
Morgan Farmer
United Kingdom
I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
Remi Nuyts
United States
Passed ITIL 4 Foundation with 87%. Material was enough by itself.
Archie Hopkins
United States
I had a smooth experience from start to finish. Access was available right away, no technical issues, which made it easy to get started. The content felt relevant and aligned well with what I was looking for.
Nancy Mcbride
United States
Does what it says it does. Content felt solid, nothing confusing to navigate and I didn't run into any weird issues. I been putting off scheduling the exam for a while and going through this gave me enough confidence to finally book it and pass.
Neil Savage
United States
A very quick response was received via email when a link issue occurred. The study materials provided were high quality and extremely helpful. I was able to complete the test successfully. Many thanks for the excellent support.

Before you buy

Answers about access, updates, payments, and the refund policy.

01Are these real exam questions?

Our Cisco 400-051 questions are based on real exam experiences and are continuously updated to match the current exam format. Most candidates who study with us report passing on their first attempt, based on a self reported post exam survey.

02What happens if I don't pass the exam?

With our Premium package, you get a 100% money back guarantee. If you don't pass your exam after studying with our materials, simply contact us with your exam results and we'll refund your purchase. Terms and conditions apply, read our full refund policy to learn more.

03How often are the questions updated?

Our question bank is updated regularly based on feedback from recent exam takers. We typically review and update our content every week with reports about new questions or changes to the exam format.

04Can I extend my access period?

Yes. When your access is close to expiring, you can renew it for another 30 days directly from the exam page. If you need more time while you are still preparing, reach out and we will help.

05Is this a single payment or a subscription?

This is a single payment with no recurring charges. Once you purchase, you get full access to all exam questions for the duration of your package (30 days for Standard, 90 days for Premium). No hidden fees or automatic renewals.

06How many questions are included?

You get access to all 939 questions in our database for the Cisco 400-051 exam. This includes detailed explanations and answer justifications to help you understand the concepts thoroughly.

07Do you offer technical support?

Yes. Email us at hello@examice.com for help with access, billing, or the platform. We read every message and typically reply within 24 hours on business days.

08Is my payment secure?

Absolutely! We use industry standard SSL encryption and process all payments through Stripe, a trusted payment processor used by millions of businesses worldwide. Your payment and personal information are completely secure.

Ready to unlock the rest

All 939 questions from $25, single payment, instant access.

Back to plans