Chapter 3 Customer Service Answers 1. The wireless standard is designed to provide network access for computing devices regardless of where they are located physically. To obtain this physical independence, devices use radio waves rather than network cabling. 2. In a FDDI network layout, a pair of fiber-optic rings connects each device. Each ring contains a single token, and the tokens travel in opposite directions between the devices. If a break or other problem occurs in the primary ring, the secondary ring acts as a backup, assuring that data continues to move on the network. Since FDDI networks are fault tolerant and support high data transmission speeds, they are commonly used as network backbones.