To see current binding issues, consider two
computer hosts in the neighborhood, each
equipped with the same brand of wireless mice
and keyboards. When powering up the hosts, a
user can hardly predict which peripherals are
connected to either host. A possible consequence
is that both mice are bound to one
host and the keyboards to the other. Such
binding relationships will inconvenience the
user unless these devices are reconfigured
properly. Another common occurrence in
using electrical appliances takes place when a
wall switch is utilized to control a fixed set of
ceiling lamps in a conference room. One can
often find it difficult to keep suitable combinations
of lamps on or off for groups when making
a presentation. These examples imply that
an automatic or preset binding may not cater
well for everyday needs.