In the MPLS label, if the label value assigned by the outbound node to the penultimate hop node is 0, the second-to-last hop LSR needs to push the label with the value 0 into the top of the packet label value and forward it to the last hop. The last hop finds that the label value carried in the packet is 0, and the label is ejected. 0 tag is only valid when it appears at the bottom of the stack.

In the MPLS label, if the label value assigned by the outbound node to the penultimate hop node is 0, the second-to-last hop LSR needs to push the label with the value 0 into the top of the packet label value and forward it to the last hop. The last hop finds that the label value carried in the packet is 0, and the label is ejected. 0 tag is only valid when it appears at the bottom of the stack.
A . TRUE
B . FALSE

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Answer: A