Like our vestigial appendix, which can sometimes burst and cause us trouble, the origins of “modern” networking date back so far that weird shapes and forms still guide us under the surface as we conduct our cyberspace 3D adventures. Reader Rick wrote in with a question about networking that relates to this: I have disconnected my MacBook Pro from all external connections (Ethernet cable unplugged, Wi-Fi and Bluetooth off). But if I look in Activity Monitor > Network, there are lots of pa...
