Fiber Distributed Data Interface (FDDI) is a standard for data transmission in a local area network. It uses optical fiber.A FDDI network contains two rings, one as a secondary backup in case the primary ring fails. The primary ring offers up to 100 Mbit/s capacity. When a network has no requirement for the secondary ring to do backup, it can also carry data, extending capacity to 200 Mbit/s

ISDN:defined as Integrated Services Digital Network is Standard for the communication for Digital transmission of voice, video, data, and other network services simultaneously over the traditional circuits of the public switched telephone network.
ISDN belongs to circuit-switched telephone network system,also can provide access to packet switched networks.
BRI:stands for Basic Rate Interface,primarily for use in subscriber lines.The BRI provides 2 bearer channels (B channels) at 64 kbit/s each and 1 data channel (D channel) at 16 kbit/s

PRI: stands for Primary Rate Interface is the ISDN Configuration ,PRI ISDN is used for connecting private branch exchanges to the public network.

CSMA/CD Carrier sense multiple access with collision detection is a is a media access control used in Ethernet

The bus is the simplest (and the traditional) topology. Standard Ethernet (10BASE5) and Thin Ethernet (10BASE2), both based on coax cable systems, use the bus