SR-MPLS is enabled on all routers. The label information encapsulated by R1 into a data packet is shown in the figure. Which of the following MPLS labels is carried in the data packet when it is sent from R2 to R4?
SR-MPLS is enabled on all routers. The label information encapsulated by R1 into a data packet is shown in the figure. Which of the following MPLS labels is carried in the data packet when it is sent from R2 to R4?
The MPLS label stack originating from R1 encapsulates the path information through the network. When a packet traverses through intermediary routers, each router swaps the top label with the appropriate label for the next hop. Starting from R1, the packet is labeled with 2013 (R1 to R3), then 2032 (R3 to R2), and then 2024 (R2 to R4). When R2 forwards the packet to R4, it uses the top label 2024 because that’s the next hop label instructed by the label switching mechanism.
B is the correct Answer
why not B?! 2024