from
The Free On-line Dictionary of Computing (8 July 2008)
dual-attached
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.
(1994-12-13)