The book says very little about arcnet, I think because the authors never had any experience with it. 1st type was 4 mbit, current is 16 mbit over cat 5 twisted pair. Most newer Apple computers now just use Ethernet so Apple Talk is a legacy and almost dead. There ARE gateways to go from Apple Talk to Ethernet. Use radio OR infrared waves.
Wireless hubs connect to twisted pair hubs to allow interconnectivity.
Use to connect 2 buildings together. Short distance, few hundred yards. Minimizes jaming and eavesdropping, but more difficult to synchronize and more expensive hardware. Increased noise distortion - radio waves are not protected in any way from RF interference 2. Generally in 1 of 2 places.