Apple IMAC User Manual - Page 40
New Technologies - 24, source. Devices can only connect to hubs. Devices cannot
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Basics New Technologies - 2 4 • Devices, which connect to hubs and provide expanded functionality to the computer. Devices connect to the host using either the 1.5 or the 12 Mbps connection speed. Like hubs, devices may be "bus-powered" by the USB network, or be "self-powered" by an external power source. Devices can only connect to hubs. Devices cannot connect directly to devices, but looks can be deceiving, since some devices are combined with hubs in the same physical case.
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Basics
New Technologies - 24
•
Devices, which connect to hubs and provide expanded
functionality to the computer. Devices connect to the host
using either the 1.5 or the 12 Mbps connection speed.
Like hubs, devices may be “bus-powered” by the USB
network, or be “self-powered” by an external power
source. Devices can only connect to hubs. Devices cannot
connect directly to devices, but looks can be deceiving,
since some devices are combined with hubs in the same
physical case.