Cisco 400-007 Questions Answers
Cisco Certified Design Expert (CCDE v3.1)- 503 Questions & Answers
- Update Date : August 03, 2026
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Cisco 400-007 Sample Questions
Question # 1Which component of the SDN architecture automatically ensures that application traffic is routed according to policies established by network administrators?
A. packet forwarding engine
B. northbound API
C. southbound API
D. SDN controller
Question # 2
Which three items do you recommend for control plane hardening of an infrastructure device? (Choose three.)
A. routing protocol authentication
B. SNMPv3
C. Control Plane Policing
D. redundant AAA servers
E. warning banners
F. to enable unused services
Question # 3
The Company XYZ network requires OSPF dead neighbor detection in a subsecond manner However the company network does not support BFD Which other feature can be used to fulfill the design requirement?
A. STP
B. fast hello
C. LFA
D. DPD
Question # 4
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
Question # 5
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
Question # 6
Company XYZ, a global content provider, owns data centers on different continents. Their data center design involves a standard three-layer design with a Layer 3-only core. HSRP is used as the FHRP. They require VLAN extension across access switches in all data centers, and they plan to purchase a Layer 2 interconnection between two of their data centers in Europe. In the absence of other business or technical constraints, which termination point is optimal for the Layer 2 interconnection?
A. at the core layer, to otter the possibility to isolate STP domains
B. at me aggregation layer because it is the Layer 2 to Layer 3 demarcation point
C. at the access layer because the STP root bridge does not need to align with the HSRP active node.
D. at the core layer because all external connections must terminate there for security reasons
Question # 7
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
Question # 8
Which design consideration is valid when you contrast fabricPath and trill?
A. FabricPath uses IS-IS, but TRILL uses VxLAN
B. FabricPath permits active-active FHRP and TRILL support anycast gateway.
C. FabricPath Permits ECMP, but TRILL does not
D. FabricPath permits active-active mode, but TRILL supports only active-standby mode.
Question # 9
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
Question # 10
A network engineering team is in the process of designing a lab network for a customer demonstration. The design engineer wants to show that the resiliency of the MPLS traffic Engineering Fast Reroute solution has the same failover/failback times as a traditional SONET/SDH network (around 50MSEC). In order to address both link failure and node failure within the lab typology network, which type of the MPLS TE tunnels must be considered for this demonstration?
A. TE backup tunnel
B. Next-hop (NHop) tunnel
C. FRR Backup tunnel
D. next-next-hop (NNHop) tunnel
Question # 11
Which two benefits can software-defined networks provide to businesses? (Choose two.)
A. provides additional redundancy
B. reduction of OpEx/CapEx
C. reduced latency
D. decentralized management
E. enables innovation
F. meets high traffic demands
Question # 12
What advantage of placing the IS-IS layer 2 flooding domain boundary at the core Layer in a threelayer hierarchical network is true?
A. The Layer 1 and Layer 2 domains can easily overlap
B. It reduces the complexity of the Layer 1 domains
C. It can be applied to any kind of topology
D. The Layer 2 domain is contained and more stable
Question # 13
Which three items do you recommend for control plane hardening of an infrastructure device? (Choose three.)
A. routing protocol authentication
B. SNMPv3
C. Control Plane Policing
D. redundant AAA servers
E. warning banners
F. to enable unused services
Question # 14
The Company XYZ network requires OSPF dead neighbor detection in a subsecond manner However the company network does not support BFD Which other feature can be used to fulfill the design requirement?
A. STP
B. fast hello
C. LFA
D. DPD
Question # 15
Which DCI technology utilizes a œflood and learn technique to populate the Layer2 forwarding table?
A. LISP
B. OTV
C. VPLS
D. EVPN