Cisco 300-420 Exam Prep Course (Premium File)
AI-Powered Designing Cisco Enterprise Networks (ENSLD) Exam - Pass on Your First Try

Last updated on May 26, 2026

 300-420 Practice Exam
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Last Updated: 26-May-2026
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All Designing Cisco Enterprise Networks (ENSLD) certification learning material, study guide, training courses are created by a team of Cisco training experts. The Study Guide and .EXM training software files contain relevant Designing Cisco Enterprise Networks (ENSLD) content, labs, practice questions and explanation. This 300-420 exam guide and training courses is based on the latest exam outlines available!

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Designing Cisco Enterprise Networks (ENSLD) Study package designed to help you confidently pass your exam.

The 300-420 Exam Prep Features:

  • Contains the most relevant and up to date 300-420 study material covering all exam topics on the latest 300-420 certification.
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How to Prepare and Pass the Cisco® 300-420 Exam

If you are aspiring to become a certified Cisco® professional and specialize in designing Cisco enterprise networks, the Cisco® 300-420 exam is an essential step in your journey. This article will provide you with comprehensive information on how to prepare effectively and pass the exam with confidence.

About the Cisco® 300-420 Exam

The Cisco® 300-420 exam, also known as the Designing Cisco Enterprise Networks (ENSLD) exam, is designed to validate your knowledge and skills in designing enterprise networks using Cisco technologies. It focuses on advanced enterprise network design principles and concepts.

Here are some key details about the exam:

  • Exam code: 300-420 ENSLD
  • Exam duration: 90 minutes
  • Number of questions: 60-70
  • Exam format: Multiple choice (single and multiple answers), drag-and-drop, simulation, and simlet
  • Exam language: English
  • Exam registration: Pearson VUE

Exam Topics

The 300-420 exam covers various topics related to enterprise network design. It is important to have a solid understanding of these topics to succeed in the exam:

  • Advanced addressing and routing solutions
  • Advanced enterprise campus networks
  • WAN for enterprise networks
  • Enterprise data center integration
  • Security services
  • Network services

Preparation Tips

To increase your chances of success in the Cisco® 300-420 exam, it is crucial to have a well-structured study plan and use reliable resources. Here are some actionable tips to help you prepare effectively:

  1. Understand the exam objectives: Familiarize yourself with the exam topics and objectives outlined in the official Cisco® exam blueprint. This will guide your study plan and ensure you cover all the necessary areas.
  2. Review Cisco® documentation: Cisco provides extensive documentation, whitepapers, and design guides related to enterprise networks. Make use of these resources to deepen your understanding of the topics and gain practical insights.
  3. Enroll in official training: Consider enrolling in a Cisco® authorized training course for the 300-420 exam. These courses provide structured learning and hands-on practice, enhancing your knowledge and skills.
  4. Practice with Cisco® labs: Cisco offers virtual labs and sandbox environments where you can practice designing enterprise networks using Cisco technologies. Utilize these resources to gain hands-on experience and reinforce your understanding.
  5. Join study groups or forums: Engage with a community of fellow learners or professionals preparing for the same exam. Participating in study groups or online forums allows you to discuss topics, share insights, and learn from others' experiences.
  6. Take practice exams: Practice exams are invaluable for assessing your knowledge and familiarizing yourself with the exam format. Cisco® provides official practice exams that simulate the real exam environment.
  7. Manage your time: Create a study schedule that suits your routine and allows you to allocate sufficient time for each exam topic. Be consistent and disciplined in your study approach.
  8. Review and revise: Regularly review the concepts you have learned and revise any areas where you feel less confident. Focus on understanding the underlying principles rather than memorizing specific details.
  9. Stay updated: Keep up with the latest trends, technologies, and updates related to enterprise network design. Subscribe to Cisco® blogs, follow industry experts, and explore relevant resources to stay current.
  10. Stay confident and motivated: Believe in your abilities and stay motivated throughout your preparation journey. Maintain a positive mindset and embrace challenges as opportunities for growth.

By following these tips and investing dedicated effort in your preparation, you can approach the Cisco® 300-420 exam with confidence and increase your chances of success.

Conclusion

The Cisco® 300-420 exam is an important milestone in becoming a certified Cisco professional specializing in enterprise network design. With a strategic study plan, utilization of reliable resources, and a focused approach, you can prepare effectively and pass the exam successfully. Remember to stay determined, practice hands-on, and continuously update your knowledge to excel in your career as a Cisco® professional.

Good luck with your Cisco® 300-420 exam preparation!

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Question 2:

  • Correct answer: Set-MsolCompanySettings

  • Why:
- Self-service sign-up (SSS) is a tenant-wide setting in Azure AD/MSOL. To prevent external users from creating new accounts in your contoso.com tenant via SSS, you modify the MSOL company settings. - The cmdlet to configure these tenant-wide settings is Set-MsolCompanySettings. - The other options operate on federation settings or domain-level configurations (e.g., Set-MsolDomainFederationSettings, Update-MsolfederatedDomain, Set-MsolDomain) and do not control self-service sign-up behavior.

Saldanha, South Africa

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Question 0:
You’re right to question it, but in this exam context the correct option is A: create_resource("res1", "ComputerVision", "F0", "westus").
Why:

  • The task is to generate captions of images, which uses the Computer Vision resource, not Custom Vision.
  • The requirement specifies a free Azure resource, so you should use the free tier F0 in the West US region.
  • The other options either use the wrong service (CustomVision.Prediction) or a paid tier (S0).

If you’ve seen F0 not available for Computer Vision in your actual Azure portal, that’s a portal/region nuance, but for the exam scenario the expected choice is A.

Singapore, Singapore

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Question 17:

  • Correct answer: A

  • Why: To generate captions of images, you need a ComputerVision resource, not CustomVision.Prediction. The task specifies a free Azure resource, so use the free tier F0 and set the location to westus. The other options either use the wrong service (Custom Vision) or use a paid tier (S0). The function call should be:
create_resource("res1", "ComputerVision", "F0", "westus")

Singapore, Singapore

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Question 46:

  • The correct completion is: collection of information concepts and their relationships to one another.

  • In TOGAF/Enterprise Architecture, an information map is a visual representation of the information landscape. It shows what information assets exist, where they reside, and how they relate and flow between systems. It helps identify key data concepts, their locations, and the dependencies between them.

Hersonissos, Greece

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Question 1810:

  • Correct answer: C — User acceptance testing (UAT)

  • Why: In year two, business processes are updated to implement new functionality. UAT verifies that the new functionality meets business requirements, is usable by end users, and supports necessary controls and reporting. It provides the final confirmation before go-live.

  • Why the others are weaker:
- Data migration: important, but primarily a year-one activity focused on moving data, not validating the new functionality. - Sociability testing: (not a standard term here) generally would cover technical or integration aspects rather than end-user acceptance of new processes. - Initial user access provisioning: security setup; important but not the primary focus for validating updated business processes.
  • Practical tip: base UAT on real business scenarios, ensure the UAT environment mirrors production, require business owner sign-off, and maintain traceability between requirements and test cases.

Riyadh, Saudi Arabia

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Question 1807:

  • Correct answer: D — Previous system interface testing records

  • Why: since the two business-critical systems haven’t been tested since implementation, the most relevant evidence for planning an audit is what was previously tested on the interfaces between those systems. These records show the actual interface test scope, data mappings, validation rules, error handling, and reconciliation checks, and help identify gaps to address during the audit.

  • Why others are weaker:
- Quality assurance (QA) testing: broad quality checks, not specifically focused on the data-transfer interfaces. - System change logs: show changes but not whether interfaces were tested or validated. - IT testing policies and procedures: provide governance guidance, not concrete evidence of past interface testing.
  • Practical tip: use the records to define test objectives, identify missing interface controls, and plan targeted re-testing or validation of data integrity across the interfaces.

Riyadh, Saudi Arabia

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Question 1813:
Correct answer: C

  • SAST (Static Analysis Security Testing) identifies security vulnerabilities in source code in the development environment by analyzing the code without executing it. It’s typically integrated into the SDLC (e.g., during coding or CI/CD) to catch issues early.

Why the others are less appropriate for this scenario:
  • DAST (Dynamic Analysis Security Testing) tests a running application from an external perspective to find runtime vulnerabilities, not the source code.
  • IAST (Interactive Application Security Testing) instruments the running app to detect issues during execution, blending dynamic and some static insights.
  • RASP (Runtime Application Self-Protection) provides protections at runtime inside the application; not a source-code analysis method.

Riyadh, Saudi Arabia

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Question 1811:
Correct answer: D
Reason:

  • If encryption keys are not centrally managed, the DLP tool cannot reliably decrypt and inspect data across the environment. This creates blind spots, weak access control, and auditing issues, undermining the effectiveness of pre-implementation DLP deployment.

Why the others are less critical in this context:
  • Monitor mode vs block mode affects enforcement; monitor-only reduces effectiveness but is not as fundamental a risk as broken key management.
  • Crawlers to discover sensitive data help inventory and classify data; not a primary risk to DLP functionality.
  • Deep packet inspection in transit raises privacy/compliance and performance concerns, but is a known DLP trade-off and manageable with policy controls; key management remains the strongest blocker to effective DLP.

Riyadh, Saudi Arabia

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Question 121:

  • Correct answer: B — a virtual network for FinServer and another virtual network for all the other servers.

  • Why:
- In Azure, network segmentation is done with VNets. Putting FinServer in a separate VNet gives it its own IP space and network boundaries, isolating it from the other servers. - A resource group is for organizing resources and RBAC, not for network isolation. - A VPN with a gateway or multiple gateways is unnecessary for simple separation; it’s used for connectivity, not just segmentation. - One resource group with a lock does not affect network isolation.
  • Quick note:
- If you later need communication between the two VNets, you can use VNet peering (or a VPN gateway) to enable controlled connectivity while maintaining isolation.

Rudolfstetten, Switzerland

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Question 86:

  • Correct answer: Vertical scaling

  • Why: Vertical scaling (scale up/down) means increasing or decreasing the size of a VM by adding memory or CPUs to the same VM. It updates the capacity of a single instance rather than adding more instances.

  • How it compares to other terms:
- Horizontal scaling (scale out/in): changes the number of VM instances, not the size of each one. - Elasticity: broad concept of adapting resources to demand (includes vertical and horizontal scaling). - Agility: general capability; not specific to VM capacity.
  • Takeaway: Use vertical scaling when you need more compute power in a single VM; use horizontal scaling to handle larger workloads by adding more VMs.

Rudolfstetten, Switzerland