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Cisco 400-007 Exam Syllabus Topics:

Section	Weight	Objectives
Business Strategy Design	15%	- Assess business goals and drivers 1. Evaluate risk management and business continuity strategies 2. Analyze company financial metrics and drivers like CAPEX, OPEX, and ROI 3. Determine regulatory and compliance constraints - Evaluate project management methodologies impact 1. Agile framework and iterative lifecycle alignment 2. Waterfall framework implementation constraints
Service Design	15%	- Design infrastructure and network virtualization 1. MPLS architecture implementations such as LDP and Segment Routing 2. Cloud integration models including hybrid and multi-cloud environments - Incorporate automation and network programmability 1. Data parsing structures using JSON and XML formats 2. Infrastructure as Code tool adoption
Security Design	15%	- Design secure perimeter and edge boundaries 1. Firewall and Intrusion Prevention System deployment modes 2. Enterprise cryptography architectures and VPN frameworks - Design secure infrastructure controls 1. Layer 2 and Layer 3 security defense mechanisms 2. Network virtualization security and microsegmentation
Control, Data, Management Plane and Operational Design	25%	- Design control plane routing architectures 1. IPv4 and IPv6 dual-stack infrastructure transitions 2. Multicast routing designs and protocol options 3. Unicast routing protocols including OSPF, EIGRP, IS-IS, and BGP - Design data plane transport and management plane strategies 1. Network visibility, telemetry, and logging infrastructures 2. End-to-end Quality of Service policies
Network Design	30%	- Design Service Provider and Enterprise WAN architectures 1. WAN transport technologies including MPLS, Layer 3 VPN, and Metro Ethernet 2. Data center interconnect solutions 3. Software-Defined WAN design implementations - Design resilient and scalable campus architectures 1. High availability techniques and fast convergence mechanisms 2. Layer 2 and Layer 3 boundary definitions

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Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q275-Q280):

NEW QUESTION # 275
Which two benefits can software defined networks provide to businesses? (Choose two.)

A. Provides additional redundancy
B. Decentralized management
C. Meets high traffic demands
D. Reduction of OpEx/CapEx
E. Reduced latency
F. Enables innovation

Answer: D,F

Explanation:
* D (Enables innovation):SDN allows new services, business models, and automation capabilities.
* E (OpEx/CapEx reduction):Automation reduces operational effort, and commodity hardware reduces CapEx.
Other options explained:
* A: Redundancy depends on physical design.
* B: SDN centralizes management.
* C/F: SDN doesn't directly impact latency or capacity.

NEW QUESTION # 276
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 dropped due to an unsuccessful RPF check against the multicast receiver.
B. It is dropped due to an unsuccessful RPF check against the multicast source
C. It is switched given that no RPF check is performed
D. It is switched due to a successful RPF check against the routing table

Answer: D

Explanation:
In PIM Sparse Mode, when the Last-Hop Router (LHR) receives multicast traffic on the shared tree (*,G), it performs an RPF check based on the RP address, not the multicast source address. In the diagram:
* The LHR has IGP cost 10 towards the RP.
* The shared tree (*,G) uses RP as the RPF target.
* Since multicast traffic on (*,G) arrives on the interface toward RP (correct RPF interface), the RPF check succeeds.
Therefore, the multicast traffic is successfully switched toward the receivers.
This behavior is fully aligned with CCDE v3.1 multicast design principles, which emphasize clear understanding of RPF behavior both on shared trees (*,G) and source trees (S,G).
Why other options are incorrect:
* A: The RPF check is not performed against the source in (*,G); it uses RP.
* B: RPF checks are always performed, even on (*,G).
* D: RPF is unrelated to the receiver address.

NEW QUESTION # 277
Refer to the exhibit

A service provider has a requirement to use Ethernet OAM to detect end-to-end connectivity failures between SP-SW1 and SP- SW2 Which two ways to design this solution are true? (Choose two)

A. Use upward maintenance endpoints on the SP switches
B. Enable Connectivity Fault Management on the SP switches150
C. Forward LLD PDUs over the VPLS
D. Enable unicast heartbeat messages to be periodically exchanged between MEPs
E. Forward E-LMI PDUs over VPLS

Answer: A,B

NEW QUESTION # 278
Which development model is closely associated with traditional project management?

A. evolutionary delivery model
B. lifecycle model
C. Agile model
D. static model

Answer: A

NEW QUESTION # 279
You want to add 900 VLANs to an existing 90 in a data center. What are two spanning tree concerns to consider?

A. To add 990 VLANs to the switching hardware, reserved VLANs require using extended VLAN
B. BPDU does not support 990 VLANs
C. The PVST+ increases CPU utilization
D. The diameter of the STP topology is increased
E. STP is increased by a factor of 10 convergence time

Answer: A,C

Explanation:
# Explanation:
B: Cisco switches reserve certain VLAN IDs. VLANs beyond 1005 are considered extended VLANs and may require special configuration (e.g., VTP transparent mode).
D: Each VLAN with PVST+ has its own instance of STP. Adding 900 more VLANs significantly increases the STP processing overhead on the switch's control plane and CPU.
Other options:
A: STP convergence time is more dependent on topology than VLAN count.
C: STP diameter is unrelated to the number of VLANs-it ' s a function of hops in the topology.
E: BPDU handling is VLAN-aware under PVST+; there's no direct per-BPDU VLAN limitation.
#

NEW QUESTION # 280
......

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