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Free 400-007 Exam Braindumps (page: 19)

Page 18 of 74
PDF with 382 Questions

How must the queue sizes be designed to ensure that an application functions correctly?

  1. The default queue sizes are good for any deployment as it compensates the serialization delay.
  2. The queuing delay on every device in the chain must be exactly the same to the application required delay.
  3. Each individual device queuing delay in the chain must be less than or equal to the application required delay.
  4. The sum of the queuing delay of all devices plus serialization delay in the chain must be less than or equal to the application required delay.

Answer(s): D

Explanation:

The queuing delay is the time that a packet spends waiting in a queue before it is transmitted. The serialization delay is the time it takes to serialize a packet onto a link. The application required delay is the maximum amount of time that a packet can spend in the network before it is delivered to its destination.

If the sum of the queuing delay of all devices plus serialization delay in the chain is greater than the application required delay, then packets will be dropped. This is because the packets will not be able to get through the network in time to meet the application's requirements.

Therefore, the queue sizes must be designed so that the sum of the queuing delay of all devices plus serialization delay in the chain is less than or equal to the application required delay.



An enterprise requires MPLS connected branches to access cloud-based Microsoft 365 services over an SD-WAN solution. Internet access is available only at dual regional hub sites that are connected to the MPLS network. Which connectivity method provides an optimum access method to the cloud-based services if one ISP suffers loss or latency?

  1. Cloud onRamp SWG
  2. Cloud onRamp
  3. Cloud onRamp gateway site
  4. Cloud onRamp SaaS

Answer(s): D

Explanation:

Cloud OnRamp gateway site is only one of a few method to optimise SAAS connectivity within a SDWAN implementation. the overarching solution is 'Cloud OnRmap SAAS'. with the options provided D is the most accurate answer


Reference:

https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/cloudonramp/vedge-20-x/cloud-onramp-book-vedge/cor-saas.html#common-scenarios-cor-saas-b



As part of workspace digitization, a large enterprise has migrated all their users to Desktop as a Service (DaaS), by hosting the backend system in their on-premises data center. Some of the branches have started to experience disconnections to the DaaS at periodic intervals, however, local users in the data center and head office do not experience this behavior. Which technology can be used to mitigate this issue?

  1. traffic policing
  2. WRED
  3. tail drop
  4. traffic shaping

Answer(s): B

Explanation:

Different from RED, WRED can assign DaaS packets to have greater minimum thershold then have higher priority not to be dropped.


Reference:

https://www.ciscopress.com/articles/article.asp?p=352991&seqNum=8



A European government passport agency considers upgrading its IT systems to increase performance and workload flexibility in response to constantly changing requirements. The budget manager wants to reduce capital expenses and IT staff and must adopt the lowest-cost technology. Which technology choice is suitable?

  1. public cloud
  2. hybrid cloud
  3. on premises
  4. private cloud

Answer(s): D

Explanation:

on-prem is out because of requirement to reduce IT staff
public cloud is out because of government data must be secure and regulatory requirements.
Hybrid combines on-premises infrastructure with a public cloud so out because of above reasons.
Only leaves Private cloud

Government related and tight data governance rules is the most impostant. Data cannot be "public". On-prem and private-cloud are the only solutions, where private-cloud can lower the cost.






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