The exhibit highlights in blue the primary path of a segment going from router S to router D.
The exhibit also shows a backup path. The protected link fails and fast re-route is triggered on router S. If the backup path has been calculated using standard LFA, how many SIDs are included in the label stack of the data packet forwarded to router R1?

• A.1
• B.3
• C.2
• D.4

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Which of the following statements about Segment Routing tunnels is FALSE?

• A.A Segment Routing tunnel defined by a Node-SID uses the shortest IGP Path.
• B.A Segment Routing tunnel can be defined by multiple Node-SIDs.
• C.A Segment Routing tunnel can be defined by a combination of Node-SIDs and Adjacency-SIDs.
• D.For a Segment Routing tunnel, an intermediate router will always forward the packet based on the best IGP path.

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Based on the exhibit, and given that the system IP address of router RIO is 10.10.10.10, which of the following statements is FALSE?

• A.Router RIO participates in flex-algo instance 130.
• B.The Node-SID assigned to router RIO for flex-algo instance 129 is 524338.
• C.The underlying routing protocol being used in the network for segment routing is IS-IS.
• D.Router Rl participates in at least two flex-algo instances.

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Which of the following statements about the operation of seamless-BFD is FALSE?

• A.Seamless-BFD responses are sent back using the LSP label stack.
• B.To be able to respond to seamless-BFD messages, a router must be configured as a reflector.
• C.A seamless-BFD template needs to be configured on the head-end of the LSP.
• D.The routing protocol (OSPF or IS-IS) is used to carry the reflector discriminator information.

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