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Cisco 400-007 exam is a challenging certification exam that requires extensive preparation. Candidates must have a deep understanding of network design principles, protocols, and technologies. They must also have hands-on experience designing and implementing network solutions. To prepare for the exam, candidates should review the Cisco CCDE exam topics, study the Cisco CCDE reference materials, and practice designing and configuring complex networks.
Cisco Certified Design Expert (CCDE v3.0) Written Certification Exam, also known as Cisco 400-007, is a professional-level certification exam designed for experienced network architects and designers who are seeking to validate their expert-level knowledge and skills in designing complex network infrastructure solutions. Cisco Certified Design Expert (CCDE v3.0) Written Exam certification exam is part of the Cisco Certified Design Expert (CCDE) certification program, which is recognized worldwide as one of the most prestigious and respected design credentials in the networking industry.
NEW QUESTION # 145
In 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.)
- A. Support availability
- B. Network reliability
- C. Resolution time
- D. Network size and cost
- E. Network sustainability
Answer: A,C
Explanation:
* B (Support availability):Defines hours of service and whether support is available 24/7 or during business hours.
* E (Resolution time):Specifies the timeframe within which the service provider commits to resolve incidents.
Other options explained:
* A: Cost and size are contractual, not SLA performance metrics.
* C: Sustainability is long-term environmental or operational, not SLA-specific.
* D: Reliability is often captured as uptime or availability but not as a discrete SLA support term.
NEW QUESTION # 146
Refer to the exhibit.
As part of a redesign project, you must predict multicast behavior What happens to the multicast traffic received on the shared tree (*,G), if it is received on the LHR interface indicated*?
- A. It is switched due to a successful RPF check against the routing table
- B. It is switched give that no RPF check is performed
- C. It is dropped due to an unsuccessful RPF check against the multicast source
- D. It is dropped due to an unsuccessful RPk8t8ck against the multicast receiver.
Answer: C
Explanation:
https://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/16450-mcastguide0.html When a multicast packet arrives on an interface, the RPF process checks to ensure that this incoming interface is the outgoing interface used by unicast routing in order to reach the source of the multicast packet. This RPF check process prevents loops. Multicast routing does not forward a packet unless the source of the packet passes a RPF check. Once a packet passes this RPF check, multicast routing forwards the packet based only upon the destination address.
NEW QUESTION # 147
In the wake of a security compromise incident where the internal networks were breached by an outside attacker at the perimeter of the infrastructure, an enterprise is now evaluating potential measures that can help protect against the same type of incident in the future. What are two design options that can be employed?
(Choose two)
- A. segmentation
- B. microperimeters
- C. virtualization
- D. microzoning
- E. domain fencing
Answer: A,B
NEW QUESTION # 148
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?
- A. innovate and align with business according to volume
- B. due diligence and financial scenarios
- C. financial and governance models
- D. contingency exit strategy steps
Answer: D
NEW QUESTION # 149
Which two data plane hardening techniques are true? (Choose two)
- A. redundant AAA servers
- B. SNMPv3
- C. Control Plane Policing
- D. infrastructure ACLs
- E. routing protocol authentication
- F. disable unused services
- G. warning banners
Answer: D,E
Explanation:
* E (Infrastructure ACLs): iACLs control what traffic can reach network infrastructure devices, directly securing the data plane.
* G (Routing Protocol Authentication): Prevents malicious or spoofed routing updates which directly protect data plane routing decisions.
Why other options are incorrect:
* A: Warning banners are management plane hardening.
* B: Redundant AAA is management/control plane hardening.
* C: CPPr protects the control plane.
* D: SNMPv3 secures management plane.
* F: Disabling unused services typically applies to management plane or control plane, not data plane.
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NEW QUESTION # 150
Refer to the exhibit.
Traffic was equally balanced between Layer 3 links on core switches SW1 and SW2 before an introduction of the new video server in the network. This video server uses multicast to send video streams to hosts and now one of the links between core switches is over utilized Which design solution solves this issue?
- A. Add more links between core switches.
- B. Filter IGMP joins on an over -utilized link.
- C. Apply a more granular load-balancing method on SW2.
- D. Aggregate links Layer 2 link aggregation.
- E. Apply a more granular load- balancing method on SW1.
Answer: D
NEW QUESTION # 151
Which architecture does not require an explicit multicast signaling protocol, such as PIM or P2MP, to signal the multicast state hop-by-hop, but instead uses a link state protocol to advertise the multicast forwarding state?
- A. Binary indexed explicit routing
- B. Binary intermediate enhanced routing
- C. Bi-directional implicit replication
- D. Bit indexed explicit replication
Answer: D
NEW QUESTION # 152
Company XYZ wants to secure the data plane of their network. Which two technologies can be included in the security design? (Choose two)
- A. BEEP
- B. CPPr
- C. MPP
- D. IP Source Guard
- E. DAI
Answer: D,E
Explanation:
* A (DAI - Dynamic ARP Inspection): Prevents ARP spoofing attacks on the data plane.
* B (IP Source Guard): Prevents IP address spoofing by verifying IP/MAC bindings against DHCP snooping tables.
* Both are directly applied to securing the data plane (traffic forwarding layer).
Why other options are incorrect:
* C (BEEP): A transport protocol, not a data plane security feature.
* D (CPPr): Protects the control plane, not data plane.
* E (MPP): Protects management plane, not data plane.
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NEW QUESTION # 153
Refer to the exhibit.
This network is running OSPF as the routing protocol. The internal networks are being advertised in OSPF.
London and Rome are using the direct link to reach each other although the transfer rates are better via Barcelona. Which OSPF design change allows OSPF to calculate the proper costs?
- A. Change the OSPF reference bandwidth to accommodate faster links.
- B. Filter the routes on the link between London and Rome.
- C. Implement OSPF summarization to fix the issue.
- D. Change the interface bandwidth on all the links.
Answer: A
Explanation:
* A (Change OSPF reference bandwidth): OSPF calculates path cost based on interface bandwidth using a formula where cost = reference bandwidth / interface bandwidth. The default OSPF reference bandwidth is 100 Mbps, which causes all faster links (1 Gbps and above) to appear with the same minimum cost.
* Updating the reference bandwidth (e.g., to 10000 or higher) allows OSPF to assign accurate costs to faster links, enabling proper path selection that reflects real link capacities.
Other options explained:
* B: Filtering is not the correct method for path optimization.
* C: Changing interface bandwidth values is a workaround but not scalable or recommended compared to updating the reference bandwidth globally.
* D: Summarization addresses prefix aggregation, not cost calculation.
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NEW QUESTION # 154
According to the CIA triad principles for network security design, which principle should be priority for a Zero Trust network?
- A. ensuring that authorized users have high-availability system access from defined zones to defined systems or zones
- B. requirement for data-at-rest encryption foe user identification within the VPN termination hardware
- C. requirement for data-in-motion encryption and 2FA authentication
- D. categorization of systems, data, and enterprise BYOD assets that are connected to network zones based on individual privacy needs
Answer: B
NEW QUESTION # 155
A network security team uses a purpose-built tool to actively monitor the campus network, applications, and user activity. The team also analyzes enterprise telemetry data from IPFIX data records that are received from devices in the campus network. Which action can be taken based on the augmented data?
- A. Integration with an incident response plan
- B. Reduction in time to detect and respond to threats
- C. Adoption and improvement of threat-detection response
- D. Asset identification and grouping decisions
Answer: B
Explanation:
* A (Faster detection and response):Telemetry like IPFIX enables real-time network visibility and anomaly detection, significantly improving Mean Time to Detect (MTTD) and Mean Time to Respond (MTTR).
Other options explained:
* B: IPFIX feeds data to incident response, but doesn't directly integrate plans.
* C: IPFIX improves detection but primarily reduces response time.
* D: Asset identification typically uses CMDB or inventory tools, not IPFIX alone.
NEW QUESTION # 156
Which two application requirements are mandatory for traffic to receive proper treatment when placed in the priority queue? (Choose two.)
- A. Intolerance to jitter
- B. Small transactions (HTTP-like behavior)
- C. WRED drop treatment
- D. TCP-based application
- E. Tolerance to packet loss
Answer: A,D
Explanation:
The priority queue (strict priority queue) is intended for real-time, delay-sensitive traffic like voice and certain video, which have:
* D. Intolerance to jitter: Real-time traffic requires consistent latency.
* E. TCP-based application: Many real-time video streams and some financial trading apps use TCP but still require minimal jitter and latency.
CCDE v3.1 emphasizes that strict priority queue should only be used for traffic highly sensitive to delay and jitter to avoid starving other queues.
Why other options are incorrect:
* A: HTTP-like small transactions are delay-tolerant.
* B: WRED (Weighted Random Early Detection) is used for congestion avoidance, not prioritization.
* C: Priority queue is specifically for traffic intolerant to loss and jitter.
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NEW QUESTION # 157
An enterprise campus is adopting a network virtualization design solution with these requirements
* It must include the ability to virtualize the data plane and control plane by using VLANs and VRFs
* It must maintain end-to-end logical path transport separation across the network
* resources available grouped at the access edge
Which two primary models can this network virtualization design be categorized? (Choose two)
- A. Edge isolation
- B. Group virtualization
- C. Services virtualization
- D. Path isolation
- E. Session isolation
Answer: C,D
NEW QUESTION # 158
A multicast network is sing Bidirectional PIM. Which two combined actions achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two)
- A. Use anycast RP based on MSDP peering between the two RPs
- B. Use two phantom RP addresses
- C. Manipulate the multicast routing table by creating static mroutes to the two RPs
- D. Advertise the two RP addresses in the routing protocol
- E. Control routing to the two RPs through a longest match prefix
- F. Manipulate the administration distance of the unicast routes to the two RPs
Answer: B,E
Explanation:
https://community.cisco.com/t5/networking-knowledge-base/rp-redundancy-with-pim-bidir-phantom-rp/ta-p/3117191
NEW QUESTION # 159
Which optimal use of interface dampening on a fast convergence network design is true?
- A. When occasional flaps of long duration occur
- B. when numerous adjacent flaps of very short duration occur
- C. when the router hardware it slower than the carrier delay down detection
- D. when the switch hardware is faster than the debounce timer down detection
Answer: B
NEW QUESTION # 160
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.)
- A. enhanced security
- B. ability to place workloads across clouds
- C. unidirectional workload mobility across the cloud
- D. centralized visibility
- E. data and network ownership
Answer: A,B
NEW QUESTION # 161
What is the most important operational driver when building a resilient and secure modular network design?
- A. Reduce the frequency of failures requiring human intervention
- B. Minimize app downtime
- C. Increase time spent on developing new features
- D. Dependencies on hardware or software that is difficult to scale
Answer: A
Explanation:
A modular, scalable network design aims to:
* Localize faults
* Reduce impact radius of failures
* Enable automated fault detection and recovery
The primary operational driver is to reduce the need for manual intervention during failures, which translates to:
* Faster recovery times
* Consistency in troubleshooting
* Improved service reliability
While minimizing app downtime (B) is a goal, it is a result of reducing human-required failure recovery.
Option C is a business process goal, and D is an architectural challenge, not an operational driver.
This aligns with CCDE v3.1's "Network Architecture Principles" for building operationally resilient networks.
NEW QUESTION # 162
Drag and drop the QoS technologies from the left onto the correct capabilities on the right
Answer:
Explanation:
NEW QUESTION # 163
What are two examples of business goals to be considered when a network design is built? (Choose two.)
- A. reduce complexity
- B. integrate endpoint posture
- C. minimize operational costs
- D. ensure faster obsolescence
- E. standardize resiliency
Answer: A,C
NEW QUESTION # 164
A company uses equipment from multiple vendors in a data center fabric to deliver SDN, enable maximum flexibility, and provide the best return on investment. Which YANG data model should be adopted for comprehensive features to simplify and streamline automation for the SDN fabric?
- A. proprietary
- B. native
- C. IETF
- D. OpenConfig
Answer: D
NEW QUESTION # 165
Organizations that embrace Zero Trust initiatives ranging from business policies to technology infrastructure can reap business and security benefits. Which two domains should be covered under Zero Trust initiatives?
(Choose two)
- A. work domain
- B. workplace
- C. workload
- D. workgroup
- E. workspace
Answer: B,C
Explanation:
* Zero Trust principles cover multiple domains:
* A (Workload): Securing application workloads regardless of location.
* C (Workplace): Securing user access to services across office, remote, or hybrid work models.
* Zero Trust design ensures authentication, authorization, and policy enforcement at every access point for both users and applications.
Why other options are incorrect:
* B, D, E: These terms are not recognized Zero Trust domains in CCDE or industry frameworks.
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NEW QUESTION # 166
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The CCDE certification is recognized as one of the most prestigious certifications in the networking industry. It is designed for senior-level network architects, engineers, and designers who are responsible for designing, implementing, and managing large-scale networks. The CCDE certification is focused on network design principles and best practices, and it covers a wide range of topics related to network design, including network architecture, protocols, security, and scalability.
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