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Frames
Up until now, our primary focus has
been discussing the movement of raw blocks of data, called
frames, through the lower hardware layers of the OSI model.
Layers 1 and 2 of the OSI model handle frame transmission,
with data moving across the network in chunks (frames) whose
size is determined by hardware capabilities. So, at the lowest
levels, protocols are expressed in terms of the exchange
of frames among hardware devices.
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CertiGuide for Network+ (http://www.CertiGuide.com/netplus/) on CertiGuide.com
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