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Components
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forwarding : uses tag information carried by packets, and tag-forwarding information maintained by a tag switch
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control : responsible for maintaining correct tag-forwarding information among a group of interconnected tag switches
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Tag switching can be implemented over any media type (point-to-point, ATM, etc)
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Forwarding component
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based on the notion of label swapping : the switch is using incoming packet tag information as an index in the TIB - Tag Information Base (outgoing tag, outgoing link-level info, outgoing interface)
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