4A0-116 Practice Exam — Free Nokia Certification Prep

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Question 1

Introduction to segment routing

Which of the following statements about a Segment Routing SID is FALSE?

A A Node-SID is usually associated with a router's system interface.
B Adjacency-SID values are taken from the SRGB configured for the routing protocol.
C A Prefix-SID can be configured directly as a label value or indirectly as an index.
D An Adjacency-SID does not have to be configured.

Question 2

Introduction to segment routing

Question 3

Introduction to segment routing

Question 4

Basic segment routing configuration and operation

Question 5

Basic segment routing configuration and operation

Question 6

Segment routing tunnels with traffic engineering constraints

Question 7

Segment routing tunnels with traffic engineering constraints

Question 8

Segment routing tunnels with traffic engineering constraints

Question 9

Segment routing tunnels with traffic engineering constraints

Question 10

Basic segment routing configuration and operation

Question 11

Segment routing tunnels with traffic engineering constraints

Question 12

Segment routing tunnels with traffic engineering constraints

Question 13

SR-TE with a path computation element

Question 14

Segment routing fast re-route

Question 15

Introduction to segment routing

Question 16

SR-TE with a path computation element

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Topics covered:

Introduction to segment routingBasic segment routing configuration and operationSegment routing tunnels with traffic engineering constraintsSR-TE with a path computation elementSegment routing fast re-routeFlexible algorithms (flex-algo)

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Which of the following statements about Multi-Protocol Label Switching networks is FALSE?

A MPLS uses a signaling protocol to exchange labels between routers.
B An LSR forwards data based on the MPLS labels.
C An LSP is a bi-directional tunnel that uses MPLS labels to forward data.
D The data is transparently carried from end to end.

Which of the following statements about a Segment Routing SID is FALSE?

A A local Node-SID can be configured directly as an MPLS label.
B A router advertises its local Node-SID as a local SRGB and an index only if it is configured as an index.
C All routers do NOT need to have the same SRGB range configured.
D A local Node-SID can be configured as an index.

When OSPF is used to support Segment Routing, the first byte of the link-state ID associated with each of the opaque LSAs indicates the type of information being advertised. Which of the following associations between the first-byte value and its meaning is FALSE?

A Value 1 - Traffic Engineering
B Value 4 - Router Info
C Value 7 - SRGB Range
D Value 8 - Extended Link Info

Which of the following steps is NOT required when configuring IS-IS to support Segment Routing?

A MPLS label range reserved for Segment Routing.
B Enable interfaces used for Segment Routing under the MPLS context.
C The flooding scope of Segment Routing information.
D The Segment Routing Global Block range.

Question 6

Segment routing tunnels with traffic engineering constraints

Question 7

Segment routing tunnels with traffic engineering constraints

Question 8

Segment routing tunnels with traffic engineering constraints

Question 9

Segment routing tunnels with traffic engineering constraints

Question 10

Basic segment routing configuration and operation

Question 11

Segment routing tunnels with traffic engineering constraints

Question 12

Segment routing tunnels with traffic engineering constraints

Question 13

SR-TE with a path computation element

Question 14

Segment routing fast re-route

Question 15

Introduction to segment routing

Question 16

SR-TE with a path computation element

Which of the following statements about SR-TE administrative constraints is FALSE?

A A strict hop must be adjacent to the previous hop in the list.
B The TE metric for a link is by default the same as the IGP metric.
C Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
D The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.

A router participating in SR-TE is advertising a value of 0x11 for the admin-group membership of one of its interfaces. Which of the following statements is TRUE?

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

Which of the following statements about enabling and using traffic engineering for Segment Routing is FALSE?

A One interface can belong to an admin group and an SRLG group at the same time.
B A link attribute has to be assigned to a particular interface under the [/configure router interface] context.
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.

Which of the following list of SR-TE attributes has to be advertised among routers?

A Administrative groups that each link belongs to, TE metric of links, bandwidth availability of each link, SRLG that each link belongs to.
B Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to.
C Administrative groups that each link belongs to, TE metric of links, bandwidth availability of each link, SRLG that each link belongs to, link status up/down.
D Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to, link status up/down.

Based upon the exhibit, which of the following statements regarding the configuration is FALSE?

Question Image

A Traffic engineering information will only be advertised for the interfaces that have both MPLS and RSVP enabled.
B The Node-SID assigned to this router is the second label in the defined range.
C Traffic engineering has been enabled on this router.
D Adjacency-SID labels will not be advertised as they have not been defined under the physical interfaces.

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

Examine the exhibit.

Question Image

Based upon the configuration, which routers will the LSP go through?

A R1, R3, R2, R5, R4 and R6
B R1, R2, R5 and R6
C R1, R3, R4 and R6
D R1, R2, R4 and R6

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

An SR-TE LSP with a path definition that includes router R4 as a loose hop and for which Seamless-BFD has been enabled is following the path shown in the exhibit. What happens after router R4 fails if the routers along the path follow the default behavior?

Question Image

A The head end will periodically try to calculate a new path at a rate defined by the retry timer.
B The head end will periodically try to calculate a new path at a rate defined by the resignal timer.
C The head end will continue forwarding traffic to the current next-hop indefinitely, which will be discarded at the point of failure.
D The head end will continue forwarding traffic to the current next-hop indefinitely, and R2 will redirect the traffic to R3 after IGP reconvergence.

Which of the following statements about path definitions is FALSE?

A Once a path is associated with an LSP, it cannot be used by other LSPs.
B A loose hop is one that does not have to be directly adjacent to the previous hop in the path list.
C The path hops can be defined by either the system or physical interface IP address.
D In addition to the hops defined in the path list, the head-end and tail-end routers are implicitly added.

Which of the following is an advantage of enabling label stack reduction for a CSPF-calculated path, as compared to using plain CSPF?

A The number of hops included in the end-to-end path is reduced.
B The path calculation can be delegated to an external path computation element (PCE).
C There is a larger list of traffic-engineering constraint types that can be imposed on the LSP path.
D The routers in the calculated path can take advantage of ECMP to better distribute the traffic load.

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