Terms and Definitions

Table 6 contains some terms and definitions used in this document.

Table 6. Terms and definitions

Term	Definition
Active Optical Cable (AOC)	An optical fiber cable with an optical transceiver with the fibers bonded inside and not removable. The optical transceiver converts the host electrical signals into light pulses and back
InfiniBand	InfiniBand is a computer-communications standard used in HPC that features very high throughput and very low latency. InfiniBand is commonly used in HPC and hyperscale data centers. InfiniBand is promoted by the InfiniBand Trade Association (IBTA).
Quad Small Form-factor Pluggable (QSFP)	A bidirectional transceiver or cable with four lanes in each direction.
Small Form-factor Pluggable (SFP)	A transceiver or cable with a single lane (channel) in each direction. All cables and transceivers commonly used in data centers are bidirectional.
Transceiver	A converter with an electrical connector in one end and an optical connector in the other end. It can have one or more parallel lanes in each direction (transmit and receive).