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To prepare for the CCDE certification exam, candidates must have a thorough understanding of network design principles, including network topology, protocols, and technologies. They must also be familiar with network design methodologies, including the Cisco Lifecycle Services approach. Additionally, candidates must be able to demonstrate their ability to design complex networks that meet specific business requirements and are scalable, secure, and reliable.

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Cisco Certified Design Expert (CCDE v3.0) Written Exam Sample Questions (Q346-Q351):

NEW QUESTION # 346
Company XYZ is designing their network using the three-layer hierarchical model. At which layer must the QoS design classify or mark the traffic?

A. collapsed core
B. distribution
C. core
D. access

Answer: D

NEW QUESTION # 347
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. switching
C. service chaining
D. linking
E. daisy chaining

Answer: C

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. Reference:
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

NEW QUESTION # 348
You are a network designer and you must ensure that the network you design is secure. How do you plan to prevent infected devices on your network from sourcing random DDoS attacks using forged source address?

A. ACL based forwarding
B. ACL filtering by destination
C. unicast RPF strict mode
D. unicast RPF loose mode

Answer: C

NEW QUESTION # 349
Refer to the exhibit.

A customer runs OSPF with Area 5 between its aggregation router and an internal router When a network change occurs in the backbone. Area 5 starts having connectivity issues due to the SPF algorithm recalculating an abnormal number of times in Area 5 You are tasked to redesign this network to increase resiliency on the customer network with the caveat that Router B does not support the stub area How can you accomplish this task*?

A. Implement LSA filtering ontheAB, allowing summary routes and preventing more specific routes into Area 5
B. Turn on LSA throttling on all devices in Area 5
C. Set Area 5 to stubby at the ABR anyway
D. Increase the bandwidth on the connection between Router A and Router B
E. Create a virtual link to Area 0 from Router B to the ABR

Answer: A

NEW QUESTION # 350
Refer to the exhibit.

Refer to the exhibit. An architect must design an enterprise WAN that connects the headquarters with 22 branch offices. The number of remote sites is expected to triple in the next three years. The final solution must comply with these requirements:
Only the loopback address of each of the enterprise CE X and Y routers must be advertised to the interconnecting service provider cloud network.
The transport layer must carry the VPNv4 label and VPN payload over the MP-BGP control plane.
The transport layer must not be under service provider control.
Which enterprise WAN transport virtualization technique meets the requirements?

A. DMVPN per VRF
B. EIGRP Over the Top
C. MPLS over BGP over multipoint GRE
D. point-to-point GRE per VRF

Answer: C

NEW QUESTION # 351
......

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