Cisco Designing Cisco Enterprise Networks : 300-420

  • Exam Code: 300-420
  • Exam Name: Designing Cisco Enterprise Networks
  • Updated: Oct 16, 2026     Q & A: 457 Questions and Answers

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About Cisco 300-420 Exam

Your information stays secret and safe throughout. From the free 300-420 practice test to the full Cisco Designing Cisco Enterprise Networks package, PracticeTorrent protects your personal details — and in 2026, that commitment matters as much as the 457 practice questions themselves.

Cisco 300-420 Exam Overview:

Certification Vendor:Cisco
Exam Name:Designing Cisco Enterprise Networks
Exam Number:300-420 ENSLD
Available Languages:English, Japanese
Exam Price:USD 400
Passing Score:Pass/Fail
Certificate Validity Period:3 years
Real Exam Qty:55–65
Exam Duration:90 minutes
Exam Format:Scenario-based, Drag-and-drop, Simulations, Multiple choice
Related Certifications:Cisco Certified Network Professional (CCNP) Enterprise
Cisco Certified Specialist – Enterprise Design
Recommended Training:Designing Cisco Enterprise Networks (ENSLD) Official Training
Exam Registration:Pearson VUE
Cisco Official Registration
Sample Questions:Free Download 300-420 exam dumps pdf
Exam Way:Online proctored or in-person at authorized test centers
Pre Condition:Recommended: Implementing and Operating Cisco Enterprise Network Core Technologies (350-401 ENCOR) or equivalent knowledge
Official Syllabus URL:https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/ensld-300-420.html

Cisco 300-420 Exam Syllabus Topics:

SectionWeightObjectives
Advanced Addressing and Routing Solutions25%- IPv4 and IPv6 addressing design
  • 1. Route summarization and aggregation
    • 2. Structured addressing plans
      - Routing protocol design
      • 1. OSPF design
        • 2. EIGRP design
          • 3. Route redistribution and filtering
            • 4. IS-IS design
              Network Services15%- IP services
              • 1. DHCP, DNS, NAT
                - Quality of Service (QoS)
                • 1. Classification and marking
                  • 2. Policing, shaping, congestion management
                    - Multicast design
                    Software-Defined Access (SDA)5%- Control plane and data plane design
                    - SD-Access architecture
                    - Fabric design and deployment
                    Advanced Enterprise Campus Networks25%- Layer 2 campus design
                    • 1. Hierarchical architecture
                      • 2. Spanning Tree Protocol optimization
                        • 3. VLAN and trunking design
                          - Wireless integration
                          - Layer 3 campus design
                          • 1. Virtualization and segmentation
                            • 2. Routing in campus infrastructure
                              Security Services10%- Secure connectivity
                              - Security architecture design
                              • 1. Threat defense integration
                                • 2. Network segmentation
                                  WAN for Enterprise Networks20%- WAN resiliency and high availability
                                  - VPN design
                                  • 1. DMVPN, L2VPN, L3VPN
                                    • 2. Site-to-site VPN
                                      - WAN connectivity options
                                      • 1. MPLS, Metro Ethernet, 4G/5G
                                        • 2. SD-WAN architecture and design

                                          300-420 Exam Facts and Product Questions

                                          Currency is maintained daily, not occasionally. Our IT staff reviews and updates the Cisco Designing Cisco Enterprise Networks question bank every day to keep it aligned with the live 300-420 exam. If a revision is underway when you buy or during your update period, we notify you and send the updated version as soon as it is ready — free within your 365 days of updates. You will never be left studying a stale edition without knowing it.

                                          The 300-420 exam is the official assessment behind the Cisco Designing Cisco Enterprise Networks certification from Cisco, and its pass rate is genuinely low — many candidates need two or three attempts to get through. The difficulty is real, but it is also manageable: candidates who prepare with material aligned to the published objectives give themselves a far better starting position than those who walk in underprepared.

                                          Registration for the 300-420 exam runs through these official channels:

                                          Given how commonly this exam takes more than one attempt, schedule your sitting only when your practice results say you are ready.

                                          The official outline divides the 300-420 exam into weighted domains, including:

                                          • WAN for Enterprise Networks (20%)
                                          • Advanced Enterprise Campus Networks (25%)
                                          • Advanced Addressing and Routing Solutions (25%)

                                          The Cisco Designing Cisco Enterprise Networks question bank at PracticeTorrent is updated daily against these same objectives, and the free practice test lets you sample that alignment yourself.

                                          Cisco recommends these training resources for candidates:

                                          Official training builds the foundation; a daily-reviewed practice bank with expert-verified answers builds the exam-day readiness. Use both.

                                          Only while you want us to. Update notifications about the Cisco Designing Cisco Enterprise Networks materials are sent because they are useful; once you have passed the 300-420 exam, one email to our team opts you out completely — no junk mail, ever. Your personal information is kept secret and safe throughout, and never shared with third parties.

                                          Passing the 300-420 exam requires Pass/Fail, and registration costs USD 400 — per attempt. With retakes so common on this exam, preparing properly for one focused attempt is the choice that protects your budget.

                                          The 300-420 exam contains 55–65 questions with 90 minutes minutes to complete them. Practicing under the same time limit is the reliable way to make exam-day pacing feel familiar rather than frantic.

                                          Recommended: Implementing and Operating Cisco Enterprise Network Core Technologies (350-401 ENCOR) or equivalent knowledge

                                          Cisco Designing Cisco Enterprise Networks Sample Questions:

                                          Question #1

                                          A company requested that an architect propose a new IPv4 and IPv6 deployment strategy. The company wants a solution that is straightforward, with no information hiding or forwarding overhead. Which solution meets these requirements?

                                          • A. GRE tunnels
                                          • B. NAT64
                                          • C. dual-stack
                                          • D. LISP
                                          Reveal Solution  Discussion  0

                                          Correct Answer: C  🗳️

                                          Question #2

                                          An enterprise needs to enhance its WAN availability after a recent outage with its only MPLS provider. The proposed solution must have a quick deployment, be affordable, be reliable, and work as a backup for the enterprise's primary MPLS connection. Which solution meets these requirements?

                                          • A. Contract another MPLS provider and deploy GET VPN.
                                          • B. Contract an internet connection and deploy DMVPN.
                                          • C. Deploy BFD echo mode and probe provider PE.
                                          • D. Deploy an additional WAN router and use a floating static route.
                                          Reveal Solution  Discussion  0

                                          Correct Answer: B  🗳️

                                          Explanation: Only visible for PracticeTorrent members. You can sign-up / login (it's free).

                                          Question #3

                                          Which method will filter routes between EIGRP neighbors within the same autonomous system?

                                          • A. policy-based routing
                                          • B. leak-map
                                          • C. route tagging
                                          • D. distribute-list
                                          Reveal Solution  Discussion  0

                                          Correct Answer: D  🗳️

                                          Question #4

                                          What is a benefit of using VRRPv3 as compared to VRRPv2?

                                          • A. VRRPv3 supports stateful switchover
                                          • B. VRRPv3 supports preemption
                                          • C. VRRPv3 supports authentication
                                          • D. VRRPv3 supports IPv4 and IPv6
                                          Reveal Solution  Discussion  0

                                          Correct Answer: D  🗳️

                                          Explanation: Only visible for PracticeTorrent members. You can sign-up / login (it's free).

                                          Question #5

                                          An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?

                                          • A. reducing the EIGRP Hello / Hold timer values
                                          • B. EIGRP summarization from access to aggregation layer
                                          • C. EIGRP summarization from core to aggregation layer
                                          • D. enabling BFD for EIGRP on the access layer uplinks
                                          Reveal Solution  Discussion  0

                                          Correct Answer: D  🗳️

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