Which method encloses traffic inside an additional protocol layer, letting multiple logical segments share the same underlying hardware?
Overlay network
Dedicated link
Spanning tree
Local bridging
An overlay network adds an encapsulation layer that allows distinct segments to operate on the same physical environment. Local bridging merges broadcast domains, dedicated link references a private physical circuit, and spanning tree is used for loop avoidance. These do not rely on an extra layer to isolate traffic.
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