JN0-363 · Question #13
Referring to the exhibit. Which two statements ate correct about the actions taken as the packet traverses the service provider MPLS network from Site 1 to Site 2 as shown in the exhibit? (Choose…
The correct answer is A. R2 will perform a lookup using the mpls.0 table. C. R1 will perform a lookup using the mpls.0 table. In MPLS (Multiprotocol Label Switching) networks, routers use label switching to forward packets. The first router at the edge of the MPLS network (R1) will perform a lookup in the mpls.0 table to determine the label to attach to the packet as it enters the MPLS network. This…
Question
Referring to the exhibit. Which two statements ate correct about the actions taken as the packet traverses the service provider MPLS network from Site 1 to Site 2 as shown in the exhibit? (Choose two.)
Exhibit
Options
- AR2 will perform a lookup using the mpls.0 table.
- BR1 will perform a lookup using the lnet.3 table.
- CR1 will perform a lookup using the mpls.0 table.
- DR2 will perform a lookup using the inet.3 table.
How the community answered
(26 responses)- A81% (21)
- B8% (2)
- D12% (3)
Explanation
In MPLS (Multiprotocol Label Switching) networks, routers use label switching to forward packets. The first router at the edge of the MPLS network (R1) will perform a lookup in the mpls.0 table to determine the label to attach to the packet as it enters the MPLS network. This label informs the next routers in the MPLS network (like R2) on how to forward the packet. Internal MPLS routers, like R2, also perform lookups in their mpls.0 table to determine how to switch the packet toward its destination (label swapping). The inet.3 table is used for resolving next-hop information for labeled routes, but it's the mpls.0 table that is used for label switching decisions.
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