The form of FDDI interface where a device is connected to both FDDI
token-passing rings, so that uninterrupted operation continues in the event of a
failure of either of the rings. All connections to the main FDDI rings are
dual-attached. Typically, a small number of critical infrastructure devices such
as routers and concentrators are dual-attached, whereas host computers are
normally single-attached or dual-homed to a router or concentrator.
For example, a ring could be formed between a single router and two
concentrators (all dual-attached) then all other components that need to be
fault-tolerant (typically file servers) can be dual-homed to both concentrators.
DUA « dual « DUAL-607 « dual-attached » dual
boot » dual-homed » Dual In-Line