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Q-in-Q

Q-in-Q (VLAN Stacking) is an advanced networking feature that allows one VLAN (Virtual Local Area Network) to be nested within another VLAN. This technique is used to increase network flexibility and scalability, especially in provider networks where there is a need to separate customer VLANs from the provider's internal VLANs. Q-in-Q enables more efficient management and security of traffic between different network segments.

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