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Nokia Segment Routing Exam Sample Questions (Q13-Q18):
NEW QUESTION # 13
Which of the following statements about enabling and using traffic engineering for Segment Routing is FALSE?
- A. A link attribute has to be assigned to a particular interface under the [/configure router interface] context
- B. One interface can belong to an admin group and SRLG group at the same time.
- C. Bandwidth availability as a link attribute cannot be configured.
- D. The interfaces used for SR-TE LSPs have to be added to the MPLS context.
Answer: C
Explanation:
Bandwidth availability can be configured as a link attribute in SR-TE, it is used to control the amount of traffic that can be sent over a particular link.
NEW QUESTION # 14
Which of the following statements about Segment Routing is FALSE?
- A. No path signaling is required to establish an SR tunnel.
- B. Intermediate routers do not maintain any tunnel informal
- C. A link-state IGP is required to distribute SID information.
- D. For TE-constrained tunnels, each data packet typically carries a single MPLS label to specify the tunnel path.
Answer: B
Explanation:
Intermediate routers do not maintain any tunnel informal: this statement is false, Intermediate routers do maintain tunnel information, such as the Forwarding Information Base (FIB) to forward the packets according to the path specified in the packets.
NEW QUESTION # 15
Which of the following is NOT a valid option to steer traffic into a flex-algo segment-routing tunnel?
- A. Configuring and applying a VRF import policy to a VPRN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
- B. Configuring and applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
- C. Specifying the flex-algo instance ID as an additional TE constraint for an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
- D. Using a flex-algo Node-SID as an explicit hop in the path definition of an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
Answer: B
Explanation:
Applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service is not a valid option for steering traffic into a flex-algo segment-routing tunnel, VSI is not related to flex-algo SR.
NEW QUESTION # 16
Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?
- A. Only one LSP path forwards the traffic at any time,
- B. The primary path is always preferred over a secondary pa
- C. Preference values can be configured for non-standby secondary paths.
- D. Up to three paths can be configured for a given SR-TE LS
Answer: D
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 # 17
Which of the following is NOT an advantage of using a PCE for the computation of TE-constrained LSP paths, as compared to using CSPF locally on the PE router?
- A. The ability to create cross-area TE-constrained LSP paths
- B. The ability to create LSP paths with bandwidth reservation
- C. The ability to create LSPs with primary and secondary paths
- D. The ability to ensure that some LSP paths are disjoint
Answer: B
Explanation:
PCE does not have the capability to reserve bandwidth, This is a function of a Resource Reservation Protocol (RSVP) or a Label Distribution Protocol (LDP) and is done locally on the PE.
PCE can have advantages such as:
The ability to create cross-area TE-constrained LSP paths
The ability to create LSPs with primary and secondary paths
The ability to ensure that some LSP paths are disjoint
it can be used to optimize the path computation by centralizing the path calculation and by taking into account a global view of the network.
NEW QUESTION # 18
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