Question: Figure 23.5 indicates that the topmost label in a label stack is adjacent to the encapsulating layer 2 header and the label at the bottom

Figure 23.5 indicates that the topmost label in a label stack is adjacent to the encapsulating layer 2 header and the label at the bottom of the stack is adjacent to the header of the transported protocol (e.g., IP header). Explain why this is the proper order, rather than the reverse.

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