Tag: Switching

Networking

VLANs and 802.1Q Trunking: Access Ports, Trunks, and the Native-VLAN Footgun

Networking from Scratch (lesson 16) — how the 4-byte 802.1Q tag splits one switch into many logical networks, what access and trunk ports actually do, why the native VLAN bites people, voice-VLAN multiplexing, why DTP is usually disabled, and the verification commands that make switch CLI output debuggable.

Networking

Routing vs Switching: The One-Paragraph Mental Model

Networking from Scratch (lesson 5) — the difference between switches and routers in plain English, with the MAC table vs routing table side by side, a packet walked end-to-end through both, and why your home box is secretly two devices crammed into one chassis.