J

VLAN vs VXLAN explained: a VLAN tags L2 segments, VXLAN encapsulates them across L3. The 4,094 limit, VTEPs, BGP EVPN, and when you actually need VXLAN.

Cisco Catalyst SD-WAN (formerly Viptela / Cisco SD-WAN): the naming history, the four-plane architecture, OMP routing, and the zero-touch edge onboarding flow.

A step-by-step, screenshot-by-screenshot walkthrough of installing Cisco Modeling Labs (CML) 2.10 on VMware ESXi: deploy the OVA, size the VM, attach the refplat ISO, run setup, and start your first node.

MSTP (802.1s) maps many VLANs onto a few spanning tree instances. How MST regions, instances, the IST and CIST work, with Cisco IOS XE config and verification.

How to build a working QoS policy on a Cisco router: MQC class maps, policy maps, the LLQ + CBWFQ model, and the shaper rule that makes it actually engage.

BGP weight is the first tiebreaker in the path-selection algorithm, set locally and never propagated. The three ways to set it, how it compares to LOCAL_PREF, and worked examples.