Modern phones and computers can use a different MAC address for a Wi-Fi network to reduce passive tracking. That changes how router reservations, parental controls, and device lists behave.
Dynamic Frequency Selection lets Wi-Fi share parts of 5 GHz spectrum with protected radar systems, which can create waits or channel changes that look like random Wi-Fi trouble.
Wider channels can raise peak throughput but consume more spectrum and can reduce reliability or reuse in congested environments.
Your device-to-router radio link and your modem/ONT-to-ISP access link can fail independently. Learn which indicators belong to which path.
The router and the laptop/phone/server enforce policy at different points. One is not a complete substitute for the other.
Both approaches can produce a predictable LAN address, but they place responsibility in different places and have different maintenance consequences.
Understand how a mesh system extends coverage, why node placement matters, and when wired backhaul is worth using.
Understand personal-mode Wi-Fi security, transition mode, device compatibility, and why a strong unique passphrase still matters.
Understand the route your device uses when a destination is not on the local subnet and why the gateway often doubles as the router admin address.
Learn why 192.168.x.x and 10.x.x.x are reusable private space while your public address is routed by an ISP.