Cisco CCDE 400-007 Questions & Answers

• Question 281:

  A consultant needs to evaluate project management methodologies for a new service deployment on the existing network of a customer. The customer wants to be involved in the end-to-end project progress and be provided with frequent updates. The customer also wants the ability to change the requirements if needed, as the project progresses. Which project management methodology should be used?

  A. three principles

  B. phased

  C. Agile

  D. Waterfall

  Correct Answer: C

• Question 282:

  If the desire is to connect virtual network functions together to accommodate different types of network service connectivity, what must be deployed?

  A. bridging

  B. service chaining

  C. linking

  D. daisy chaining

  E. switching

  Correct Answer: B

  Explanation: Service chaining is the technique of connecting virtual network functions together to provide different types of network service connectivity. Service chaining uses software-defined networking (SDN) programmability to create a chain of connected network services, such as firewalls, load balancers, NAT, and intrusion protection. Service chaining can automate the provisioning of network applications that have different characteristics and requirements, such as security, latency, or quality of service (QoS). Service chaining can also optimize the use of network resources and improve application performance by using SDN analytics and performance tools to select the best available network paths and avoid network congestion. Service chaining is being used in many SDN and network functions virtualization (NFV) use cases and deployments, such as data centers, carrier networks, and virtual customer edge123. References:

  1: What is Network Service Chaining or Service Function Chaining - SDxCentral

  2: On service chaining using Virtual Network Functions in Network-enabled Cloud systems | IEEE Conference Publication | IEEE Xplore

  3: Service function chaining - Gini5

• Question 283:

  Which aspect of BGP-LS makes it scalable in large network when multiarea topology information must be gathered?

  A. transmit flow control

  B. open-loop flow control

  C. hardware flow control

  D. TCP-based flow control

  Correct Answer: A

• Question 284:

  Which issue poses a challenge for security architects who want end-to-end visibility of their networks?

  A. too many overlapping controls

  B. too many disparate solutions and technology silos

  C. an overabundance of manual processes

  D. a network security skills shortage

  Correct Answer: B

• Question 285:

  Refer to the exhibit.

  

  After a network audit a network engineer must optimize the current network convergence time The proposed solution must consider link layer and control plane failures. Which solution meets the requirements?

  A. Configure debounce timers

  B. Increase fast hello timers

  C. Implement BFD

  D. Enable LSP fast flood

  Correct Answer: C

• Question 286:

  SDN is still maturing Throughout the evolution of SDN, which two things will play a key role in enabling a successful deployment and avoiding performance visibility gaps in the infrastructure? (Choose two.)

  A. rapid on-demand growth

  B. dynamic real-time change

  C. falling back to old behaviors

  D. peer-to-peer controller infrastructure

  E. integration of device context

  Correct Answer: BE

• Question 287:

  The SD-WAN architecture is composed of separate orchestration management, control, and data planes.

  Which activity happens at the orchestration plane?

  A. automatic onboarding of the SD-WAN routers into the SD-WAN overlay

  B. decision-making process on where traffic flows

  C. packet forwarding

  D. central configuration and monitoring

  Correct Answer: D

• Question 288:

  The Agile Manifesto is a document that defines the key values and principles behind the Agile philosophy and helps development teams work more efficiently and sustainably Each of the four key values is split into two sections a left-hand side and a right-hand side In other words, though there is value in the items on the right we value the items on the left more.

  What is one of the key values of the Agile Manifesto?

  A. comprehensive documentation over working software

  B. contract negotiation over customer collaboration

  C. individuals and interactions over processes and tools

  D. following a plan over responding to change

  Correct Answer: C

• Question 289:

  Enterprise XYZ wants to implement fast convergence on their network and optimize timers for OSPF However they also want to prevent excess flooding of LSAs if there is a constantly flapping link on the network.

  Which timers can help prevent excess flooding of LSAs for OSPF?

  A. OSPF propagation timers

  B. OSPF throttling timers

  C. OSPF delay timers

  D. OSPF flooding timers

  Correct Answer: B

• Question 290:

  The major business applications of an enterprise are largely monolithic and hard-coded As part of a major modernization and overhaul of the applications the goal is to move to a modular and containerized application architecture mode At the same time decoupling from the hardware is desired to move to an on-demand provisioning However the CyberOps team mandated that the final architecture must provide the same security levels as an air- gapped data center. Which cloud architecture meets these requirements?

  A. laaS

  B. private cloud

  C. PaaS

  D. hybrid cloud

  E. public cloud

  Correct Answer: B