Enterprise IT Visual Lab is the hands-on companion for network engineers, IT students, and systems professionals who learn best by doing. Version 2.0 brings major new features on top of the existing simulator and curriculum library. WHAT IS NEW IN VERSION 2.0 Challenge Mode - 20 timed real-world IT troubleshooting scenarios. Each question runs a 60-second countdown. Earn bonus points for speed and accuracy. Tracks your session score and all-time high score. Covers subnetting, switching, routing, security, and protocols. Flashcard Study - 80 interactive CCNA and CompTIA Network+ flashcards across six categories: OSI Model, IP and Subnetting, Routing, Switching and VLANs, Network Security, and Cloud and WAN. Tap to flip each card, mark it as Known or Review, and track session progress automatically. SPF and Dijkstra Simulator - Step through Dijkstra's shortest path first algorithm on a 5-router topology. Watch nodes move from unknown to candidate to settled as the shortest path tree is built. Simulate a link failure and watch the network reconverge automatically. 36 Reference Diagrams - Seven curated diagram categories with full-screen swipeable images, pinch-to-zoom, a thumbnail strip, and captions that disappear on tap for distraction-free review. 14 INTERACTIVE SIMULATORS Subnet Calculator - Enter any IPv4 address and prefix length to instantly see network address, broadcast, usable host range, wildcard mask, and host count. VLAN Planner - Design and document VLAN segmentation. Assign IDs, names, subnets, and purposes; visualize trunk and access port layouts. Routing Simulator - Watch longest-prefix match evaluate your routing table in real time against any destination IP. Firewall and ACL - Build permit/deny rules with source IP, destination IP, protocol, and port. Simulate packet traversal to see which rule matches first. Bandwidth Calculator - Compute link utilization, throughput, and queuing delay across any WAN or LAN circuit. DNS and DHCP Simulator - Animate a full recursive DNS query chain and a DHCP DORA handshake with lease time tracking. Network Topology - Live animated topology with STP convergence, link-failure injection, and redundant path activation. Load Balancer - Distribute connections using Round-Robin, Least-Connections, or IP-Hash across a real server pool. Ping Simulator - Walk an ICMP Echo request hop-by-hop through switch, router, and destination, then watch the Reply trace back. ARP Simulator - Step through broadcast request, switch flooding, target reply, and ARP cache update in six animated stages. MAC Address Table - Build a switch MAC table from scratch: source-MAC learning, unknown-unicast flooding, and known-unicast forwarding. OSPF Simulator - Form OSPF neighbors, elect DR/BDR, synchronize LSDBs, and run Dijkstra's SPF on a four-router ring. RIP Simulator - Converge four routers using RIP v2 over multiple 30-second update rounds until all tables are complete. SPF and Dijkstra Simulator - Watch nodes move from unknown to candidate to settled on a five-router topology. Simulate link failure and watch SPF re-run automatically. STRUCTURED COURSES AND LESSONS Multi-module curriculum covering networking fundamentals through advanced enterprise design. Each lesson includes explanations, code examples, and quizzes. BUILT-IN REFERENCE Instant lookup across CLI commands, protocols and ports, subnetting tables, the OSI model, standards and RFCs, design patterns, and a full glossary. DESIGNED FOR ALL APPLE DEVICES Fully responsive for iPhone and iPad in portrait and landscape. Dark-mode interface designed to reduce eye strain during long study sessions. Whether you are preparing for CCNA, CCNP, or CompTIA Network+, or designing a production enterprise network, Enterprise IT Lab gives you the mental models and hands-on practice to go from theory to real-world confidence.
