CertiGuide to A+ (A+ 4 Real)  9  Chapter 13: Basic Networking Terminology       9  OSI Reference Model and Networking Protocols and Technologies            9  Layer 2 - Data Link Layer

100VG Any-LAN 1 PAN

FDDI¹⁸⁷ is a fiber optic distributed data interface used in Token Ring.

Appeared at the end of the 1980’s.It became during that time, the highest of speed standards. The use of fiber optics has allowed the creation of networks up to 100km in distance with up to 500 workstations. The immunity of optics to interference has made FDDI the ideal protocol for backbones (networks that connect other networks together forming an Inter network). Usually, separate networks that are working on one floor of a building are called horizontal. All horizontal networks in one enterprise are combined in one network with the help of a backbone. FDDI uses the transfer of a marker, as well as, the Token Ring, the double ring, or the star topology. However, this technology died out due to the introduction of backbones in Gigabit Ethernet because the equipment is cheaper and easier to administer.

100VG Any-LAN 1 PAN