Julia Evans introduces a 24-page illustrated zine following a download across the network: packets, DNS, sockets, TCP, HTTP and TLS, plus layers and ports.
Read the full article on jvns.caSource: New zine: Networking! ACK! by Julia Evans. Licence: Link only (©).
Explains when to change Wi-Fi channels, which channels do not overlap (1, 6, 11 in the US for 802.11b/g), and what to do otherwise: keep networks five channels apart, reduce transmit power, or separate access points.
Describes how a router behind an ISP gateway splits the network into two private networks, which can break gaming, VPNs, port forwarding and some SSL sites. It points to a separate article for the fixes.
Advice on band and channel choice: on 2.4 GHz use channel 1, 6 or 11, prefer the least crowded one, and note that Auto channel is not always best; use a Wi-Fi analyzer to check.