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Nokia 4A0-116 Exam Syllabus Topics:

Topic	Details
Topic 1	Local calculation of a TE-constrained LSP path Secondary LSP paths and seamless-BFD Ensuring LSP path diversity
Topic 2	Differences between segment routing and other traditional MPLS label signaling protocols MPLS data encapsulation and forwarding
Topic 3	Steering traffic into flex-algo segment routing tunnels Advertisement of flex-algo information by IS-IS
Topic 4	Using segment routing tunnels that follow the IGP shortest path Basic segment routing configuration and operation
Topic 5	Link-state routing protocol extensions to support segment routing Configuring OSPF to support segment routing
Topic 6	Segment routing tunnels with traffic engineering constraints Enabling traffic engineering
Topic 7	Precedence of the different LFA options Enabling segment routing fast re-route Path Computation Element Protocol (PCEP)
Topic 8	Link-state routing protocol extensions to support traffic engineering Configuring OSPF to advertise TE information
Topic 9	Configuring segment routing LSPs calculated by the PCE SR-TE with a path computation element
Topic 10	Configuring segment routing LSPs with traffic engineering constraints Configuring IS-IS to advertise TE information

Nokia Segment Routing Exam Sample Questions (Q40-Q45):

NEW QUESTION # 40
OSPF is being used for segment routing with traffic-engineering (SR-TE). The traffic-engineering option has been set to "sr-te false". Which of the following statements is TRUE?

• A. The TE information will only be advertised using application-specific sub-TLVs.
• B. The TE information will only be advertised using extended-link opaque LSAs.
• C. The TE information will only be advertised for the OSPF links that have both MPLS and RSVP enabled.
• D. The TE information will be advertised for all the OSPF links that have MPLS enabled.

Answer: B Explanation:
When using Segment Routing with Traffic Engineering (SR-TE) in OSPF, the TE information is advertised using extended-link opaque LSAs. The option "sr-te false" indicates that OSPF will not advertise the TE information in the OSPF database, thus the routers will not be aware of the TE information.
NEW QUESTION # 41
A router participating in SR-TE is advertising a value of Ox11 for the admin-group membership of one of its interfaces. Which of the following statements is TRUE?

• A. The interface belongs to two different admin groups.
• B. The interface belongs to admin group RED, configured with a value of 17.
• C. The interface belongs to three different admin groups.
• D. The interface belongs to four different admin groups.

Answer: A Explanation:
In SR-TE, the admin-group is represented by a 32-bit value, where each bit represents a different admin-group. The value Ox11 in binary is 000100010001, which has two bits set to 1, indicating that the interface belongs to two different admin groups. The exact admin-groups that the interface belongs to depends on how the admin-groups have been configured on the router.
NEW QUESTION # 42
The exhibit shows the fast re-route configuration on router R1, in which both R-LFA and TI-LFA have been enabled. Assume that there are multiple potential backup paths for a given prefix. Which of the following options will router R1 use?

• A. A D-LFA path that would not coincide with the path after IGP re-convergence.
• B. An R-LFA path that would not coincide with the path after IGP re-convergence.
• C. A D-LFA path that would coincide with the path after IGP re-convergence.
• D. A standard LFA path that would not coincide with the path after IGP re-convergence.

Answer: C Explanation:
The exhibit shows that both R-LFA and TI-LFA have been enabled on router R1. R-LFA (Remote Loop-Free Alternate) is a method that is used to protect the active segment of a tunnel, and it allows the router to find a backup path that coincides with the path that will become active after IGP reconvergence. TI-LFA (Topology Independent LFA) is a method that is used to protect an end-to-end multi-segment tunnel, it allows the router to find a backup path that does not rely on the IGP topology, but on the segment routing topology.
With R-LFA and TI-LFA enabled, router R1 will use a D-LFA (Dual-Loop-Free Alternate) path, which is a combination of both R-LFA and TI-LFA, this path will coincide with the path after IGP re-convergence.
A standard LFA, R-LFA, and D-LFA which do not coincide with the path after IGP re-convergence are not the options.
NEW QUESTION # 43
Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?

• A. Preference values can be configured for non-standby secondary paths.
• B. Only one LSP path forwards the traffic at any time,
• C. Up to three paths can be configured for a given SR-TE LS
• D. The primary path is always preferred over a secondary pa

Answer: C Explanation:
Typically, in SR-TE, only two paths can be configured for a given SR-TE LSP: primary path and secondary path. The primary path is used for normal traffic forwarding, and the secondary path is used as a backup in case the primary path fails. Only one LSP path forwards the traffic at any time.
NEW QUESTION # 44
Which of the following types of information is considered by a stateless PCE when it processes a new LSP path calculation request?

• A. The operational state of existing LSP paths
• B. The amount of bandwidth reserved for each of the existing LSP paths
• C. The IGP link-state database
• D. The traffic-engineering database

Answer: C
NEW QUESTION # 45
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