| Trunking and 802.1Q — tag structure, native VLAN, DTP negotiation outcomes | chapter-2---network-access/trunking-802-1q | | EtherChannel — LACP vs. PAgP, bundling requirements, load balancing | chapter-2---network-access/etherchannel | | Inter-VLAN Routing Deep Dive — router-on-a-stick vs. Layer 3 SVI | chapter-2---network-access/inter-vlan-routing-deep-dive | | Layer 2 Discovery Protocols — CDP vs. LLDP, security implications | chapter-2---network-access/layer-2-discovery-protocols | | Wireless Architectures — autonomous vs. controller-based, CAPWAP, FlexConnect | chapter-2---network-access/wireless-architectures | | Network Access Troubleshooting — VLAN mismatch, err-disable, STP root | chapter-2---network-access/network-access-troubleshooting |

Priority: VLANs + STP + inter-VLAN routing are the core simulation trio.

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