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GUIDED LAB · 4 LESSONS
Networking Lab
CCNA fundamentals, switching, routing and troubleshooting
A place to practice network concepts in diagrams and safe lab simulations.
Learning path
Open any lesson. Every lesson includes a concept explanation, a practice task, and a short quiz.
01IP addresses and subnettingAn IPv4 address has 32 bits. A prefix such as /24 tells you how many leading bits represent the network. ...→02VLANs and 802.1Q trunksA VLAN creates a separate Layer 2 broadcast domain. An access port usually carries traffic for one VLAN, ...→03RSTP and loop preventionEthernet switching loops can cause broadcasts to circulate indefinitely. Spanning Tree Protocol blocks re...→04Routing, OSPF and NATRouters forward packets between IP networks. A routing table selects a next hop based on destination pref...→