One of the more common types is the management consultant. Consulting and the means by which the (external) consultant is engaged vary according to industry and local practice. However the principal difference between a consultant and a temp is generally one of direction.
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However, the advent of metallic connectors like the FC and ST made color coding difficult, so colored boots were often used. The TIA 568 color code for connector bodies and/or boots is Beige for multimode fiber, Blue for singlemode fiber, and Green for APC (angled) connectors.