What advantages are there to using fiber optic cabling in a network compared to coaxial cable?
FDDI is a ring protocol, based on the IEEE 802.5 Token Ring standard. An FDDI ring can be combined with 802.5 rings or 802.3 buses to provide a high throughput “backbone” for a network. (We’ll discuss combining rings more in the next unit.) Although FDDI is similar to 802.5, three important differences make the technology and protocols of FDDI more complicated. See the Fiber Distributed Data Interface (FDDI) diagram below. An 802.5 ring can have only one physical link between two nodes; FDDI has two links, with data circulating in opposite directions. An 802.5 ring can have only one token and at most one message circulating at one time; FDDI can have many on each ring. A portion of an FDDI ring data transmission capacity can be given up for “synchronous” traffic, essentially layering one or more high-speed communications channels onto the ring. Figure 4-21. Fiber Distributed Data Interface (FDDI) Multiple Message Consider the case of a single message transmitted from a node around a ri
