400-007 Der beste Partner bei Ihrer Vorbereitung der Cisco Certified Design Expert (CCDE) Written Exam

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Cisco 400-007 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Control, Data, Management Plane and Operational Design	25%	- Design data plane transport and management plane strategies 1. Network visibility, telemetry, and logging infrastructures 2. End-to-end Quality of Service policies - Design control plane routing architectures 1. IPv4 and IPv6 dual-stack infrastructure transitions 2. Unicast routing protocols including OSPF, EIGRP, IS-IS, and BGP 3. Multicast routing designs and protocol options
Topic 2: Network Design	30%	- Design Service Provider and Enterprise WAN architectures 1. Software-Defined WAN design implementations 2. WAN transport technologies including MPLS, Layer 3 VPN, and Metro Ethernet 3. Data center interconnect solutions - Design resilient and scalable campus architectures 1. Layer 2 and Layer 3 boundary definitions 2. High availability techniques and fast convergence mechanisms
Topic 3: Service Design	15%	- Incorporate automation and network programmability 1. Data parsing structures using JSON and XML formats 2. Infrastructure as Code tool adoption - Design infrastructure and network virtualization 1. Cloud integration models including hybrid and multi-cloud environments 2. MPLS architecture implementations such as LDP and Segment Routing
Topic 4: Business Strategy Design	15%	- Evaluate project management methodologies impact 1. Agile framework and iterative lifecycle alignment 2. Waterfall framework implementation constraints - Assess business goals and drivers 1. Determine regulatory and compliance constraints 2. Evaluate risk management and business continuity strategies 3. Analyze company financial metrics and drivers like CAPEX, OPEX, and ROI
Topic 5: 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. Network virtualization security and microsegmentation 2. Layer 2 and Layer 3 security defense mechanisms

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Cisco Certified Design Expert (CCDE) Written Exam 400-007 Prüfungsfragen mit Lösungen (Q303-Q308):

303. Frage
A network uses an SDN architecture with switches and a centralized controller What should be on the switches but not on the controller?

A. control plane functions
B. a southbound interface
C. a northbound interface
D. data plane functions

Antwort: B

304. Frage
Refer to the exhibit.

Refer to the exhibit. Two data center sites (X and Y) connect to the Internet and each other using a backdoor link. Both advertise the same IP prefix (100.75.10.0/23) to the Internet. Firewalls are behind R1 and R2.
Problem: When users attempt to reach 100.75.10.0/23, the return traffic is routed to Site-Y, regardless of where the session originated. This results in asymmetric traffic and potentially broken sessions due to firewall behavior.
Which design resolves the issue?

A. Use BGP MED to influence Site-X return traffic. Change the IP address scheme of both sites.
B. Change the Site-Y firewall configuration to replicate the Site-X configuration. Advertise the low MED attribute on Site-X to the Internet.
C. Establish control plane peering between edge routers. Have Site-X advertise an IP pool with a longer prefix.
D. Add a static route toward the Internet on Site-X. Change the DNS policy on Site-Y to block traffic.

Antwort: C

Begründung:
Comprehensive and Detailed Explanation:
D: The most effective solution is to have Site-X advertise a more specific (longer) prefix (e.g., 100.75.10.0
/24), which allows external BGP routers to prefer Site-X over Site-Y. This ensures traffic destined for Site-X flows directly to it, preserving symmetry. Additionally, control plane coordination between R1 and R2 ensures proper routing consistency and minimizes the risk of loops or misdirection.
Other options:
A: Using BGP MED works within the same AS; it is often ignored by external ISPs.
B: Replicating firewall behavior does not address the routing issue.
C: DNS manipulation is a workaround-not a scalable or robust design solution.
This solution is consistent with BGP best practices and CCDE v3.1 guidance on traffic engineering and policy- based routing.

305. Frage
Which two actions must be taken when assessing an existing wireless network implementation for its readiness to support voice traffic? (Choose two.)

A. Identify frequent TX power changes
B. Check for high roaming delay
C. Check for latency over wireless
D. Check for uniform radio coverage across the floors.
E. Check for high channel utilization.

Antwort: B,C

Begründung:
https://community.cisco.com/t5/wireless/channel-utilization/td-p/2716667

306. Frage
[Security, Automation, and Policy Integration in Design] The network has high CPU usage due to excessive inbound traffic impacting the control and management planes. What should be implemented?

A. TCAM carving
B. modular QoS
C. control plane policing
D. deep interface buffers

Antwort: C

Begründung:
#Explanation:
* A: Control Plane Policing (CoPP) protects the control plane by rate-limiting or dropping unnecessary or malicious traffic destined for the CPU. This is essential in preventing routing and management plane starvation under high traffic conditions.
Incorrect Options:
* B: Deep buffers help in data plane congestion, not control plane CPU usage.
* C: TCAM carving relates to hardware forwarding table allocations, not CPU protection.
* D: Modular QoS is valuable for traffic shaping but not specific to control plane protection.

307. Frage
Security experts promote the security defense-m-depth principle which states that network security should be multilayered and modular and multiple methods should be designed and applied to different parts of the network Drag and drop the characteristics on the left to the matching enterprise network components on the right.

Antwort:

Begründung:

308. Frage
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