Cisco 300-420 Exam Prep 2026

Master OSPF areas, LSA types, and troubleshooting techniques with a real-world case study.

Step-by-step lab on configuring EIGRP, including authentication and route summarization.

Understand BGP peering, attributes, and path selection through hands-on configuration.

Learn how to safely redistribute routes between OSPF, EIGRP, and BGP with filtering.

Configure OSPFv3 and EIGRP for IPv6 in a lab environment, covering key differences from IPv4.

A practical guide to VLAN configuration, trunking protocols, and troubleshooting common issues.

Learn to configure and optimize STP, RSTP, and MSTP for loop prevention and redundancy.

Build a lab to implement inter-VLAN routing using switch virtual interfaces.

Analyze and solve a complex routing loop scenario, applying concepts from previous lessons.

Configure HSRP, VRRP, and GLBP with real-case analysis for high availability.

Step-by-step guide to setting up site-to-site IPsec VPNs and resolving common errors.

Learn MPLS basics, label distribution, and how to configure LDP in a lab.

Apply Quality of Service policies to prioritize traffic, with downloadable templates.

Configure access control lists and zone-based firewalls to secure your network.

Cover WPA3, RADIUS, and mobility basics for the wireless section of the exam.

A problem-solving session focused on diagnosing and fixing security and VPN problems.

Write and run Python scripts to automate common network configuration tasks.

Create Ansible playbooks to manage multiple devices, with a real-world deployment case.

Learn to use RESTCONF and NETCONF APIs to interact with network devices programmatically.

Understand YANG models and how they structure data for automation tools.

Implement Git to track changes in your network configurations and collaborate.

Step-by-step guide to using Python to automate BGP peer configuration and monitoring.

Common errors in automation scripts and how to debug them efficiently.

Analyze a full case study where automation reduced deployment time by 50%.

Diagnose and fix API connectivity and data parsing issues in a lab.

Take a timed practice exam with questions mirroring the 300-420 format, followed by a detailed review.

A second practice test concentrated on the core routing and switching domains.

Test your knowledge on automation, security, and advanced services with this practice exam.

Learn how to analyze your practice test results and create a targeted review plan.

Get strategies for pacing yourself during the real exam and managing question difficulty.

Use downloadable flashcards and your study notes for a quick final review session.

A guide to scheduling your exam, the check-in process, and what to bring.

What to do after passing, including continuing education and recertification options.

How to translate your exam knowledge into real job tasks and career advancement.

Access our community forum for ongoing support and additional resources.

A final message to keep you motivated as you embark on your certification journey.

Get a one-page cheat sheet summarizing key commands and concepts for quick reference.

Prepare for job interviews with questions that test your ENARSI knowledge.