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In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate wide-open domains, and these Sub-VLANs are aggregated.
MPLS supports nesting of multiple labels. After receiving an MPLS packet, a device first processes the label next to the Layer 2 header, that is, the top MPLS label.
If the temperature of the device is found to be too high, it can be concluded that the fan has failed
As shown below:

About the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?
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