You are part of a network engineering team and is planning to implement a dual-ring architecture for a high-speed backbone technology for a campus LAN. However, instead of using an optical cable, it is required that the implementation makes use of UTP wires. What type of LAN technology will satisfy the requirements?

Gigabit Ethernet

Copper Distributed Data Interface

Fiber Distributed Data Interface

Fast Ethernet

Asynchronous Transfer Mode

Explanation

Copper Distributed Data Interface (CDDI) or also referred to as Twisted Pair Distributed Data Interface (TP-DDI) is a high-speed backbone technology based on Fiber Distributed Data Interface (FDDI). It uses copper wires (Unshielded Twisted-Pair) instead of fiber-optic cables. CDDI uses dual-ring architecture with traffic flowing in opposite directions (counter-rotating). Its maximum distance is up to 200 meters which, is shorter than FDDI. CDDI is defined by ANSI as X3-T9.5. FDDI is the fiber-based variation of CDDI which provides support for longer distance, no EFI, and no RFI. Both FDDI and CDDI use dual-ring architecture, thus, having higher fault-tolerance than Asynchronous Transfer Mode (ATM). However, for time-critical services such as voice data, use ATM since it achieves lower delay and delay variation than FDDI. On the other hand, use Gigabit Ethernet or Fast Ethernet if high data throughput is required, but not QoS is not a main concern.