Chapter 2
| 1. | Name the four fields that are part of a label. |
| A1: | Answer: The four fields that are part of a label are a 20-bit label value, 3 experimental bits, 1 Bottom of Stack bit, and an 8-bit TTL field. |
| 2. | How many labels can reside in a label stack? |
| A2: | Answer: Any number of labels can reside in a label stack. |
| 3. | In which layer does MPLS fit in the OSI reference model? |
| A3: | Answer: MPLS fits in no category of the OSI reference model. The best description for MPLS would be Layer 2.5. |
| 4. | Which table does an LSR use to forward labeled packets? |
| A4: | Answer: The LSR uses the LFIB table to forward labeled packets. |
| 5. | What type of interfaces in Cisco IOS use the Downstream-on-Demand label distribution mode and the per-interface label space? ... |
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