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CISCO : 300-420

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Oct 19,2026
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ENSLD : Designing Cisco Enterprise Networks
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About 300-420 Exam


Prepare for the Cisco 300-420 ENSLD (Designing Cisco Enterprise Networks) Exam and demonstrate your ability to design scalable, secure, and resilient enterprise network infrastructures. This exam is intended for networking professionals who design enterprise routing, campus networks, WAN connectivity, network services, security solutions, and Cisco Software-Defined Access (SDA).
— Exam Topics
Advanced Addressing and Routing Solutions (25%)
Advanced Enterprise Campus Networks (25%)
WAN for Enterprise Networks (20%)
Network Services (15%)
Automation (15%)
Cisco 300-420 ENSLD Exam Format
Exam code – 300-420 ENSLD
Exam name – Designing Cisco Enterprise Networks
Exam type – Proctored examination through Pearson VUE
Exam duration – 90 minutes
Exam length – Variable number of questions; Cisco does not publish a fixed question count
Passing score – Pass/Fail; Cisco does not publicly specify a fixed passing score
Delivery languages – English, Japanese
Additional study materials – Official Cisco ENSLD exam topics, Designing Cisco Enterprise Networks training, Cisco documentation, and hands-on network design labs
Exam Level – Professional
Role – Enterprise Network Designer, Network Architect, Network Engineer, or Infrastructure Consultant
Associated certification – Cisco Certified Specialist – Enterprise Design; also counts toward CCNP Enterprise when combined with the required core exam
Certification validity – 3 years, subject to Cisco recertification requirements
300-420 Exam FAQ

Q1: What are the Cisco 300-420 ENSLD exam duration, question format and passing score?

Exam Name: Designing Cisco Enterprise Networks (300-420 ENSLD) v1.1 | Level: Professional | Duration: 90 minutes | Question Count: Not officially specified by Cisco | Result: Pass/Fail
Languages: English and Japanese
Prerequisites: None
Certification: Cisco Certified Specialist – Enterprise Design
CCNP Enterprise: Fulfills the concentration exam requirement when combined with the required core exam
Validity: 3 years
Key Topics: Advanced addressing and routing solutions, enterprise campus networks, WAN design, security services, network services, and Software-Defined Access (SDA)

Q2: What topics are covered in the Cisco 300-420 ENSLD exam?

The Cisco 300-420 ENSLD exam focuses on designing enterprise networks that are scalable, secure, and resilient. Major topics include advanced IPv4 and IPv6 addressing, routing design with OSPF, EIGRP, IS-IS and BGP, high-availability campus networks, Layer 2 and Layer 3 design, WAN architecture, VPN solutions, network security, quality of service, network services, and Software-Defined Access (SDA). Candidates should follow the official ENSLD v1.1 exam blueprint for the complete syllabus.

Q3: Is the Cisco 300-420 ENSLD exam suitable for beginners?

Cisco does not require formal prerequisites for the 300-420 ENSLD exam, but it is intended for networking professionals with a strong understanding of enterprise network fundamentals. Knowledge of routing protocols, LAN and WAN technologies, IPv4 and IPv6 addressing, network security, and high availability is recommended. Beginners should first develop practical networking skills and understand network implementation before studying advanced enterprise network design.

Q4: How should I prepare for the Cisco 300-420 ENSLD exam?

Begin by reviewing the official Cisco 300-420 ENSLD v1.1 exam topics and creating a study plan around each design domain. Practice designing IPv4 and IPv6 addressing plans, routing architectures, resilient campus networks, WAN connectivity, VPN solutions, security services, and SDA deployments. Work through realistic network design scenarios and evaluate scalability, availability, security, and performance requirements. Use Cisco learning resources, hands-on labs, and practice questions to reinforce your preparation.

Q5: Why are practice questions useful for the Cisco 300-420 ENSLD exam?

Practice questions help candidates apply enterprise network design principles to realistic business and technical requirements. They reinforce knowledge of routing architecture, campus resiliency, WAN design, security, network services, and Software-Defined Access. Combine Clearcatnet PDF study materials and practice questions with official Cisco documentation and design exercises. Focus on understanding why a particular architecture meets the requirements instead of memorizing answers.

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