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400-007 Cisco Certified Design Expert (CCDE v3.1) Questions and Answers

Questions 4

Refer lo the exhibit Company XYZ BGP topology is as shown in the diagram The interface on the LA router connected toward the 10 1 5 0/24 network is faulty and is going up and down, which affects the entre routing domain Which routing technique can be used in the routing policy design so that the rest of the network is not affected by the flapping issue ?

Options:

A.

Use route filtering on Chicago router to block the 10 1.5.0V24 network from coming in from the LA router.

B.

Use route filtering on LA router To block the 10 1 5 074 network from getting propagated toward Chicago and New York.

C.

Use route aggregation on LA router to summarize the 10.1.4 074.10.1.5.0*24,10.1.6.0/24. and 10.1.7.004 networks toward Chicago.

D.

Use route dampening on LA router for the 10.1.5.074 network so that it does not get propagated when it (laps up and down)

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Questions 5

In a multi-cloud environment, which two practices should be implemented to safeguard the integrity of Al-driven network decisions? (Choose two.)

Options:

A.

executing real-time change monitoring for all Al model modifications and setups across cloud platforms

B.

employing a centralized Al control plane to oversee and supervise all machine learning models in the cloud

C.

implementing machine learning models exclusively within isolated, on-premises data centers to mitigate cloud vulnerabilities

D.

employing federated learning to guarantee data privacy and integrity across multiple cloud environments

E.

implementing rigorous network segmentation among cloud providers to avert cross-cloud data leaks

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Questions 6

In traditional network design, the network and data center are confined within a single building In this configuration, a router connects the internal and external networks Basic configuration of an access control list within the router controls the traffic that can pass through Which security technique defines the boundary between an internal/trusted network and an external/untrusted network?

Options:

A.

network segmentation

B.

security certifications

C.

encryption

D.

perimeter security

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Questions 7

Network designers often segment networks by creating modules for various reasons Sometimes however a network can be unintentionally segmented For instance, if the only way to connect a remote site to a headquarters or regional site is to connect them both to the public Internet the corporate network is now unintentionally segmented Which of the following option can be used to desegment the network in this situation?

Options:

A.

Build virtual networks that pass over the network

B.

Mark traffic for special handling through quality of service

C.

Configure little to no control data plane policy

D.

Block specific sources from reaching specific destinations

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Questions 8

An engineer must redesign the QoS strategy for Company XYZ The current network is experiencing many dropped packets due to oversubscription of the guaranteed bandwidth allocated by the service provider Company XYZ wants a design with a QoS strategy that controls the traffic flow leaving the Edge router to minimize packet drops Which QoS technique can be recommended as a solution?

Options:

A.

LLQ

B.

rate-Limiting

C.

policing

D.

traffic shaping

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Questions 9

In the case of outsourced IT services, the RTO is defined within the SLA Which two support terms are often included in the SLA by IT and other service providers’ (Choose two)

Options:

A.

Network size and cost

B.

Support availability

C.

Network sustainability

D.

Network reliability

E.

Resolution time

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Questions 10

Implementing a network automation architecture usually follows a phased approach that increases automation as the new technology and processes in the preceding phases are integrated and adopted. What provides a model that greatly simplifies the interaction with network devices?

Options:

A.

vendor specific configuration

B.

network device migration

C.

abstraction layer

D.

CI/CD framework

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Questions 11

A customer has a functional requirement that states HR systems within a data center must be segmented from other systems that reside in the same data center and same VLAN The systems run legacy applications by using hard-coded IP addresses with all HR systems dedicated to 129 to 254 of the 10 20.20 0/24 prefix Which segmentation method is optimal for the customer?

Options:

A.

transparent firewalling

B.

VACLs on data center switches

C.

routed firewalls

D.

data center perimeter firewalling

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Questions 12

An enterprise wants to migrate an on-premises network to a cloud network, and the design team is finalizing the overall migration process. Drag and drop the options from the left into the correct order on the right.

Options:

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Questions 13

Which interface between the controller and the networking device enables the two to communicate and allows the controller to program the data plane forwarding tables of the networking device?

Options:

A.

Controller interface

B.

Southbound interface

C.

Application programming interface

D.

Northbound interface

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Questions 14

Refer to the exhibit Which two design options reduce the size of OSPF database in the shown topology? (Choose two.)

Options:

A.

Loop Free Alternate

B.

type 3 LSA filtering

C.

prefix suppression

D.

Layer 2 link aggregation between core switches

E.

incremental SPF

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Questions 15

The PaaS model provides customers with a virtualized application development platform without the need for them to furnish hardware or system administration using in-house resources All necessary infrastructure components and application development services are provided and managed by the cloud service provider. Which limitation should be considered when selecting PaaS model?

Options:

A.

loss of customer control

B.

limited customization options

C.

potential network latency

D.

compatibility with existing development environments

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Questions 16

A global e-commerce company is expanding its operations and planning to migrate its entire infrastructure to a hybrid cloud solution. They are concerned about data governance and want to ensure that their customers ' data is treated with utmost respect to sovereignty and privacy. What is an appropriate approach?

Options:

A.

Replicate customer data across all data centers globally to ensure data redundancy and compliance with local data regulations.

B.

Utilize a cloud provider that offers region-specific data centers to store customer data within the same geographic region.

C.

Encrypt all customer data and store it in a public cloud environment to benefit from advanced security measures.

D.

Implement strict access controls for customer data and store it in a single central data center to maintain data sovereignty.

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Questions 17

A multinational enterprise integrates a cloud solution with these objectives

Achieve seamless connectivity across different countries and regions

Extend data center and private clouds into public clouds and provider-hosted clouds

What are two outcomes of deploying data centers and fabrics that interconnect different cloud networks? (Choose two)

Options:

A.

Enhanced security

B.

Data and network ownership

C.

Ability to place workloads across clouds

D.

Centralized visibility

E.

Unidirectional workload mobility across the cloud

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Questions 18

Refer to the diagram. Which solution must be used to send traffic from the foreign wireless LAN controller to the anchor wireless LAN controller?

Options:

A.

Send packets from the foreign controller to the anchor controller via Layer 3 MPLS VPN or VRF-Lite

B.

Send packets without encapsulation to the anchor controller over the routed network.

C.

Encapsulate packets into an EoIP tunnel and send them to the anchor controller.

D.

Send packets from the foreign controller to the anchor controller via IPinIP or IPsec tunnel.

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Questions 19

Compared to data plane traffic, control plane traffic is relatively small in volume, but these flows are critical to the overall functioning of the network infrastructure and to voice and video endpoint well. When designing a QoS policy for a network, which two actions for the network control service-class is recommended? (Choose two)

Options:

A.

A moderately provisioned guaranteed-bandwidth queue can be assigned

B.

Traffic in this class needs to carry a CS6 DSCP marking.

C.

Place the traffic in the same queue as other signalling traffic.

D.

Network control traffic may be assigned a moderately provisioned shared queue

E.

WRED must be enabled on the class to avoid traffic being dropped

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Questions 20

Company XYZ wants to use the FCAPS ISO standard for network management design. The focus of the design should be to minimize network outages by employing a set of procedures and activities to detect and isolate network issues and the appropriate corrective actions to overcome current issues and prevent them from occurring again. Which layer accomplishes this design requirement?

Options:

A.

security management

B.

accounting management

C.

performance management

D.

fault management

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Questions 21

Company XYZ has implemented policy-based routing in their network. Which potential problem must be kept in mind about network reconvergence and PBR?

Options:

A.

It can limit network scalability

B.

It can create microloops during reconvergence.

C.

It increases convergence time.

D.

It reduces convergence time.

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Questions 22

A multinational corporation intends to deploy Al/ML-driven analytics for consumer data The company operates in multiple locations, including the EU, where data protection regulations are rigorous The organization must guarantee that its Al/ML solution adheres to local regulations, especially with data storage and processing

Which cloud environment will most effectively meet the company’s data sovereignty needs while assuring adherence to regional data protection regulations?

Options:

A.

storing client data in a public cloud environment situated outside the EU and processing it via a centralized AI/ML system in the United States

B.

employing a hybrid cloud infrastructure, wherein customer data from the EU is retained in local data centers and processed within a centralized AI/ML system situated in a separate jurisdiction

C.

storing client data in a private cloud situated within the EU region to adhere to local data protection regulations

D.

using a public cloud infrastructure that permits the storage and processing of customer data in any worldwide region, devoid of specific local limitations

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Questions 23

An external edge router provides connectivity from a service provider to an enterprise Which two Internet edge best practices meet compliance regulations? (Choose two.)

Options:

A.

Implement filtering to control traffic that is sourced from the infrastructure IP space.

B.

Enable and use only secure protocols.

C.

Send logs to a centralized logging collection server.

D.

Implement EBGP to advertise all owned IP blocks.

E.

Use login banners and interface access lists to restrict administrative access to the system.

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Questions 24

multinational corporation with offices in various regions worldwide are looking for a network architecture that provides a balance between low- latency and cost-effectiveness for connecting their offices to the cloud. Which cloud connectivity option is the best fit for this corporation?

Options:

A.

DMVPN

B.

SDWAN SDCI

C.

MPLS direct connect

D.

cloud on-ramp

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Questions 25

Drag t he components that are part of the CIA triad to the correct target on the right. Not all components are used.

Options:

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Questions 26

An enterprise service provider is planning to migrate the customer network to MPLS to connect cloud applications The customer network team and service provider team are analyzing all process (tows before live migration and implementation Before planning the migration, what is a crucial task that must be executed?

Options:

A.

real-time process monitoring and maintenance

B.

impact forecasts and risk analysis

C.

application packaging and deployment

D.

impact analysis and application refactoring

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Questions 27

When planning their cloud migration journey what is crucial for virtually all organizations to perform?

Options:

A.

SASE framework deployment

B.

optimizing the WAN environment

C.

assessment of current infrastructure

D.

RPO and RTO calculations duration planning

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Questions 28

What are two reasons for a company to prefer a hybrid approach rather than a mixed approach while transitioning to a software-defined network? (Choose two.)

Options:

A.

Mixed approach creates more complexity which makes troubleshooting more difficult

B.

Hybrid approach allows box-by-box transition to spread out the costs

C.

Mixed approach is more palatable to the small-size companies

D.

Hybrid approach allows to deploy portions of the network without impacting performance

E.

Hybrid approach is more palatable to the large-size companies

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Questions 29

Company XYZ is designing the network for IPv6 security and they have these design

requirements:

A switch or router must deny access to traffic from sources with addresses that are correct, but are topologically incorrect

Devices must block Neighbor Discovery Protocol resolution for destination addresses that are not found in the binding table.

Which two IPv4 security features are recommended for this company? (Choose two)

Options:

A.

IPv6 DHCP Guard

B.

IPv6 Source Guard

C.

IPv6 Destination Guard

D.

IPv6 Prefix Guard

E.

IPv6 RA Guard

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Questions 30

Which two statements describe the functionality of OSPF packet-pacing timers? (Choose two )

Options:

A.

The group-pacing timer controls the interval that is used for group and individual LSA refreshment

B.

OSPF flood-pacing timers allow dynamic control of the OSPF transmission queue size

C.

OSPF retransmission-pacing timers allow control of interpacket spacing between consecutive link-state update packets in the OSPF retransmission queue

D.

OSPF retransmission-pacing timers allow control of packet interleaving between nonconsecutive link-state update packets in the OSPF retransmission queue

E.

OSPF flood-pacing timers allow control of interpacket spacing between consecutive link-state update packets in the OSPF transmission queue

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Questions 31

Refer to the exhibit. The enterprise customer wants to stream one-way video from their head office to eight branch offices using multicast. Their current service provider provides a Layer3 VPN solution and manages the CE routers, but they do not currently support multicast. Which solution quickly allows this multicast traffic to go through while allowing for future scalability?

Options:

A.

Enable a GRE tunnel between nodes CE1 and CE2

B.

Enable a GRE tunnel between nodes C2 and C4

C.

Enable a GRE tunnel between nodes C1 and C4

D.

Implement hub and spoke MPLS VPN over DMVPN (also known as 2547o DMVPN) between CE1 and CE2

E.

The service provider must provide a Draft Rosen solution to enable a GRE tunnel between nodes PE1 and PE2

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Questions 32

With virtualization being applied in many parts of the network, every physical link is likely to carry one or more virtual links, but what is a drawback in cases like this?

Options:

A.

unneeded tunneling

B.

fate sharing

C.

serialization delay

D.

bandwidth utilization

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Questions 33

Which three items do you recommend for control plane hardening of an infrastructure device? (Choose three.)

Options:

A.

redundant AAA servers

B.

Control Plane Policing

C.

warning banners

D.

to enable unused services

E.

SNMPv3

F.

routing protocol authentication

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Questions 34

A company with an existing multivendor network is moving from 1 G dark fiber to an ISP virtual leased-line solution The company ' s internal security policy states that any traffic traversing a network that is not owned by the company must be encrypted What must be used to meet the requirements?

Options:

A.

IPsec AH

B.

Dynamic Multipoint VPN tunnel

C.

IPsec ESP

D.

GETVPN tunnel

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Questions 35

A software-defined network can be defined as a network with an API that allows applications to understand and react to the state of the network in near real time A vendor is building an SDN solution that exposes an API to the RIB and potentially the forwarding engine directly The solution provides off-box processes with the capability to interact with the routing table in the same way as a distributed routing process Which SDN framework model does the solution use?

Options:

A.

replace

B.

augmented

C.

hybrid

D.

distributed

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Questions 36

If the desire is to connect virtual network functions together to accommodate different types of

network service connectivity, what must be deployed?

Options:

A.

Bridging

B.

Service Chaining

C.

Linking

D.

Daisy Chaining

E.

Switching

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Questions 37

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.)

Options:

A.

peer-to-peer controller infrastructure

B.

failing back to old behaviours

C.

dynamic real-time change

D.

rapid on-demand growth

E.

integration of device context

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Questions 38

A network architect is working on a large project involving migration to a software-defined networking platform, and is currently working on writing an executive summary for final approval by the management board. When writing the executive summary, What is a limitation of or challenges with software-defined networks that must be listed?

Options:

A.

Provides better flexibility but decreases the speed of service delivery.

B.

Difficulties in making significant improvements to service request response times.

C.

Virtualization inherently adds overhead and network latency.

D.

Often comes with a high CAPEX due to use of automation tools.

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Questions 39

Company XYZ has 30 sites using MPLS L3 VPN and the company is now concerned about data integrity. The company wants to redesign the security aspect of their network based on these requirements:

Securely transfer the corporate data over the private WAN

Use a centralized configuration model.

Minimize overhead on the tunneled traffic.

Which technology can be used in the new design to meet the company’s requirements?

Options:

A.

GET VPN

B.

MGRE

C.

DMVPN

D.

S-VTI

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Questions 40

A product manufacturing organization is integrating cloud services into their IT solution The IT team is working on the preparation phase of the implementation approach, which includes the Define Strategy step This step defines the scope of IT. the application, and the service. What is one topic that should be considered in the Define Strategy step?

Options:

A.

due diligence and financial scenarios

B.

innovate and align with business according to volume

C.

financial and governance models

D.

contingency exit strategy steps

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Questions 41

In large-scale networks controllers needs to be able to process millions of flows per second without compromising the quality of the service What are two actions that must be implemented to address scaling limitations when deploying the network*? (Choose two.)

Options:

A.

Spirt the control logic functions between specialized data plane devices and controllers

B.

Deploy a high-throughput application platform

C.

Delegate work to the forwarding devices to reduce control plane overhead

D.

Deploy high performance controllers to increase the performance of the data plane

E.

Deploy authoritative switches to reduce the amount of controller workloads.

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Questions 42

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

Options:

A.

OSPF throttling timers

B.

OSPF delay timer

C.

MPS OSPF flooding timers

D.

OSPF propagation timers

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Questions 43

A small organization of 20 employees is looking to deliver a network design service for modernizing customer networks to support advanced solutions.

Project scope and weekly progress should be visualized by the management.

Always consider feedback and make changes accordingly during the project.

Should consider flexibility to change scope at the point of time.

Which project methodology meets the requirements and have the least impact on the outcome?

Options:

A.

Scrum

B.

LEAN

C.

Kanban

D.

Six-Sigma

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Questions 44

Agile and Waterfall are two popular methods for organizing projects What describes any Agile network design development process?

Options:

A.

following a plan over responding to change

B.

working design over comprehensive documentation

C.

processes and tools over individuals and interactions over time

D.

contract negotiation over customer collaboration

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Questions 45

Drag and drop the QoS technologies from the left onto the correct capabilities on the right

Options:

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Questions 46

Which technique facilitates analytics and knowledge discovery in big data systems to recognize hidden and complex patterns?

Options:

A.

predictive monitoring

B.

deep learning

C.

traffic classification

D.

network mobility

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Questions 47

Flexibility, scalability, resiliency, and security are all chrematistics of a services-ready network An architecture featuring a modular design enables technologies and services to be added when the organization is ready to deploy. Drag and drop the design considerations on the left to the to type of service on the right Not all options are used

Options:

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Questions 48

Which undesired effect of increasing the jitter compensation buffer is true?

Options:

A.

The overall transport jitter decreases and quality improves

B.

The overall transport jitter increases and quality issues can occur.

C.

The overall transport delay increases and quality issues can occur.

D.

The overall transport delay decreases and quality improves.

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Questions 49

As part of a design solution a consultant needs to describe the trade-offs between different SDN models Drag the characteristics on the left to the correct controller-based network designs on the right in no particular order.

Options:

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Questions 50

In a distributed cloud-native environment, calls to services and cloud resources can fail caused by unanticipated events that will require longer periods of time to resolve. These faults can range in severity from a partial loss of connectivity to the complete failure of a service. In these situations, it ' s pointless for an application to continually retry an operation that is unlikely to succeed. Which pattern can prevent an application from repeatedly trying to execute an operation that ' s likely to fail?

Options:

A.

circuit breaker

B.

bulkhead

C.

fallback

D.

timeout

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Questions 51

PaaS provides a cloud-based platform for developing, running, managing applications. Users access the PaaS through a GUI, where development or DevOps teams can collaborate on all their work across the entire application lifecycle including coding, integration, testing, delivery, deployment, and feedback. Which benefit does an organization get by using PaaS?

Options:

A.

improved access

B.

comprehensive security

C.

improved responsiveness

D.

faster time to market

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Questions 52

Which redundancy element plays a crucial role in ensuring business continuity even in challenging situations?

Options:

A.

adapting and expanding the network

B.

network boot performance

C.

disaster recovery planning

D.

minimizing the downtime

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Questions 53

In a controller-based network architecture, between which of the two elements the southbound interface does the communication happen with a goal to program the data plane forwarding tables? (Choose two.)

Options:

A.

core components

B.

forwarding lane

C.

layer interface

D.

networking device

E.

controller

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Questions 54

Company XYZ Is running a redundant private WAN network using OSPF as the underlay protocol The current design accommodates for redundancy In the network, but it Is taking over 30 seconds for the network to reconverge upon failure Which technique can be Implemented In the design to detect such a failure in a subsecond?

Options:

A.

STP

B.

fate sharing

C.

OSPF BFD

D.

flex links

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Questions 55

Flow is a set of IP packets passing an observation point in the network during a certain time interval. A flow could consist of ail packets in a specific transport connection or a media stream. Packet flow temporal efficiency can be affected by one-way delay Drag and drop the delay types from the left onto the corresponding definitions on the right Not all are used

Options:

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Questions 56

Which component of the SDN architecture automatically ensures that application traffic is routed according to policies established by network administrators?

Options:

A.

southbound API

B.

northbound API

C.

SDN controller

D.

packet forwarding engine

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Questions 57

An enterprise SDWAN customer based in the US has several branches in Europe Currently branches use the HQ in the US to access both internal and external services over an MPLS arcuit The design team has been tasked to suggest a solution allowing branches to access their cloud-based office productivity tools and services directly Since all their applications and services are hosted in the cloud, the design team has also been asked to come up with a solution, so branches can connect to the cloud directly from the branch as well Which two cost-effective and optimized solutions can be suggested? (Choose two)

cloud onRamp (SaaS)

Options:

A.

DIA

B.

software-defined cloud interconnects

C.

cloud SSO broker

D.

cloud hubs

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Questions 58

The API of an SDN controller named CTL-A uses the HTTP POST method and the same URL for all resources The JSON body of each message is used to get information for specific resources and operations The API of a SDN controller named CTL-B uses HTTP CRUD methods and a uniform interface with different URLs for each resource Which API type is used by each SDN controller?

Options:

A.

CTL-A uses a RESTful API and CTL-B has an HTTP-based API

B.

CTL-B uses a RESTful API and CTL-A has an HTTP-based API

C.

CTL-A and CTL-B have a non-RESTful API

D.

CTL-A and CTL-B have a RESTful API

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Questions 59

The first step to building en A! strategy is understanding how it helps achieve business goals and objectives Al-first scorecard is an assessment of your organization ' s readiness to adopt and integrate AI technologies to gauge your capabilities and align stakeholders. Which scorecard is useful to understand whether the organization ' s digital infrastructure is strong enough to ensure seamless, standardized data flow between systems with optimal performance?

Options:

A.

Transfer Capabilities

B.

Data Adoption

C.

Al Architecture

D.

Data Governance

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Questions 60

Which regulatory compliance element ensures adherence to regulations and improves speed to market, which gives businesses a competitive advantage?

Options:

A.

compliance change management

B.

quality management system

C.

regulatory enhancement process

D.

robust document control

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Questions 61

which two actions must be taken when assessing an existing wireless network implementation for its readliness to support voice traffic? (choose two)

Options:

A.

Validate antenna settings on APs

B.

Verify that RX level are not above -6WBm.

C.

Analyze typical roaming delays.

D.

Identify frequent TX power changes.

E.

Check for high channel utilization

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Exam Code: 400-007
Exam Name: Cisco Certified Design Expert (CCDE v3.1)
Last Update: Apr 7, 2026
Questions: 206
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