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Nokia 4A0-103 Nokia Multi Protocol Label Switching Exam Practice Test

Demo: 37 questions
Total 249 questions
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Nokia Multi Protocol Label Switching Questions and Answers

Question 1

Click on the exhibit.

An LSP path is established on router R1 toward router R6. If the link between routers R4 and R6 goes down, which of the following is the quickest way for service recovery?

Options:

A.

Router R1 updates its FIB after a new SPF calculation.

B.

Router R1 switches to a secondary path.

C.

Router R4 switches to a FRR path.

D.

Router R4 switches to a standby secondary path.

Question 2

An LSP is enabled with one-to-one fast reroute and node protection. What action does the PLR take if node protection cannot be provided?

Options:

A.

The PLR attempts to provide link protection.

B.

The PLR disregards the request after three failed attempts.

C.

The PLR changes the PATH message to request link protection.

D.

The PLR brings down the primary LSP-path.

Question 3

Which of the following about T-LDP on the Alcatel-Lucent 7750 SR is FALSE?

Options:

A.

T-LDP is used to provide an end-to-end session between two PE routers.

B.

T-LDP is used to signal service labels for Layer 2 services.

C.

T-LDP is used to establish transport tunnels for Layer 2 services.

D.

T-LDP is used in LDP over RSVP solution.

Question 4

Which of the following about the Alcatel-Lucent 7750 SR command "own Isp-trace" is FALSE?

Options:

A.

The MPLS TTL values are incremented at each request.

B.

The router uses MPLS Echo Request packets that are IP-routed.

C.

The router collects hop information along the tunnel's path.

D.

The router performs an unidirectional LSP test.

Question 5

Which of the following is NOT required to configure an Alcatel-Lucent 7750 SR as a PE router running 6PE?

Options:

A.

Configure BGP with the IPv6 address family.

B.

Configure BGP to add IPv6 Explicit Null labels.

C.

Configure a route policy to export IPv6 routes into BGP.

D.

Configure the nexthop core router as a BGP peer.

Question 6

Which of the following about the use of RRO in fast reroute is FALSE?

Options:

A.

RRO is used to report the protection tunnel status to the head-end router.

B.

RRO contains the MP information that is required by a PLR for facility protection.

C.

RRO contains the label information that is expected by an MP for facility protection.

D.

RRO is used to inform downstream routers about the protection type requested.

Question 7

Which of the following about an established LDP session is TRUE?

Options:

A.

It uses a UDP connection with an arbitrary port number.

B.

It uses a UDP connection with well-known port number 646.

C.

It uses a TCP connection with an arbitrary port number.

D.

It uses a TCP connection with well-known port number 646.

Question 8

Click on the exhibit.

All links are operationally up initially. When the link between routers R4 and R6 goes down, what will router R1 do?

Options:

A.

Router R1 will switch traffic to the secondary path immediately.

B.

Router R1 will discard traffic until a new IGP route to router R6 is re-calculated.

C.

Router R1 will discard traffic because the secondary path isnot a fully strict path.

D.

Router R1 will signal the secondary path and switch traffic to it.

Question 9

Which of the following about LDP-over-RSVP is TRUE?

Options:

A.

RSVP LSPs must exist between each PE-ABR pair, or ABR-ABR pair in each area.

B.

When LDP-over-RSVP is active, the LDP prefixes are resolved to a physical egress interface.

C.

Targeted sessions must exist between all routers along the tunnel path.

D.

Link LDP sessions must exist between each ABR-ABR pair in each area.

Question 10

Which of the following about MPLS fast reroute is TRUE?

Options:

A.

Fast reroute is used when redundant links are not available.

B.

Fast reroute provides path protection close to the failure point.

C.

Fast reroute provides fast failure detection to the head-end router.

D.

Fast reroute protects both primary and secondary paths.

Question 11

Which of the following configurations allow a router to periodically attempt to move LSP traffic to a better path, if the head end can find one?

Options:

A.

configure router mpls retry-timer 30

B.

configure router mpls resignal-timer 30

C.

configure router mpls retry-attempts 30

D.

configure router mpls global-revertive 30

Question 12

Fill in the blanks: The device at the beginning of an LSP is referred to as the_________, and the device at the end of an LSP is referred to as the___________.

Options:

A.

PE, P

B.

LER,LSR

C.

LSR,LER

D.

iLER, eLER

E.

eLER, iLER

F.

P, PE

Question 13

Which of the following devices can originate an opaque LSA?

Options:

A.

TE enabled OSPF routers

B.

Backbone router only

C.

ABR only

D.

ASBR only

Question 14

The destination IP address of a received unlabeled packet is successfully matched in the FIB.

Which of the following is FALSE?

Options:

A.

A POP label stack operation may be performed.

B.

The outgoing interface and next-hop address will be determined from the FIB.

C.

The packet can be forwarded as a labeled or unlabeled packet.

D.

A PUSH label stack operation may be performed.

Question 15

Which of the following about RSVP-TE on an Alcatel-Lucent 7750 SR is TRUE?

Options:

A.

Label bindings are distributed to other routers when explicitly requested.

B.

Label bindings are distributed to all neighbors including non-downstream routers.

C.

Label bindings are distributed if labels have not been received from downstream routers.

D.

All labels received from downstream neighbors are stored in the LIB.

Question 16

Which of the following about RSVP-TE is TRUE?

Options:

A.

RSVP-TE is a routing protocol.

B.

RSVP-TE requests end-to-end resources for unidirectional data flow.

C.

RSVP-TE consults the local RSVP database to determine the path from source to destination.

D.

RSVP-TE generates a TED for storing traffic engineering information.

Question 17

Which of the following statements regarding per-platform label space are true? Choose two answers.

Options:

A.

A separate label is used for each interface that the FEC is advertised on.

B.

It uses fewer label resources than a per-interface label space.

C.

It is typically used when the device has ATM or Frame Relay interfaces.

D.

It uses more label resources than a per-interface label space.

E.

A single label may be assigned to an FEC and used across all interfaces of the same router.

F.

It is only valid when the LDP peers are directly connected over an interface, and the label is only going to be used for traffic sent over that interface.

Question 18

LDP is enabled on both ends of a point-to-point link, but the "show router Idp status" command indicates that LDP is operationally down. The Oper Down Reason field shows the message "systemIpDown." What might cause this condition?

Options:

A.

The LSP is in the administrative down state.

B.

The router's router ID overlaps another.

C.

The router's interfaces do not have LDP running.

D.

The router's system interface requires an IP address

Question 19

Click on the exhibit button below. Assume the following:

- The protected path is R1-R2-R3-R6.

- Fast reroute one-to-one protection is enabled.

If the original LSP already has two labels, and router R2 has failed, how many labels will there be in packets on the detour path?

Options:

A.

1

B.

2

C.

3

D.

4

Question 20

Which of the following is a primary cause of IP hyper-aggregation?

Options:

A.

IP routing protocols do not always select the best route to a destination.

B.

IP routing protocols always select multiple routes to a destination.

C.

IP routing protocols do not make use of all available network attributes to select a path

D.

Improper network design results in limited network path redundancy.

Question 21

Which of the following devices assumes the active role during the establishment of an LDP session?

Options:

A.

The peer with the higher physical address.

B.

The peer with the higher transport address.

C.

The peer with the lower physical address.

D.

The peer with the lower transport address.

E.

The peer that generated the first Hello message.

Question 22

Which of the following about an ERO in an RSVP PATH message is FALSE?

Options:

A.

ERO is used by downstream routers to determine the next-hop for the LSP.

B.

ERO contains label information used to signal an LSP path.

C.

ERO is not always present in the PATH message.

D.

Each downstream router updates information inside the ERO.

Question 23

Which of the following defines an FEC in traditional IP?

Options:

A.

A group of packets that will be forwarded by the router in the same manner, over the same path.

B.

A group of packets that arrive at the router on the same interface,

C.

A group of packets that leave the router on the same interface.

D.

A group of packets that arrive at the router on the same interface, from the same source.

Question 24

Which of the following regarding label population is TRUE?

Options:

A.

Selected labels from the FIB are populated to the LFIB.

B.

Selected labels from the RIB are populated to the FIB.

C.

Selected labels from the LIB are populated to the FIB.

D.

Selected labels from the LIB are populated to the LFIB.

Question 25

Fill in the blanks: A ________device has all interfaces inside the provider domain, and a _______ device has at least one interface outside the provider domain.

Options:

A.

PE, P

B.

P, PE

C.

PE, CE

D.

CE, PE

E.

CE, P

Question 26

Click on the exhibit.

This policy is applied on a router as an LDP export policy and an LDP session has been established between this router and its neighboring router. In addition to the FECs learned from its neighbors, what additional FECs will appear in this router's LIB?

Options:

A.

All FECs that are in the 192.168.1.0/24 address space.

B.

Local FECs that are in the 192.168.1.0/24 address space.

C.

All FECs that are not in the 192.168.1.0/24 address space.

D.

All FECs except the local FECs that are in the 192.168.1.0/24 address space.

Question 27

Which of the following is NOT an application of MPLS?

Options:

A.

Enabling VPNs

B.

Enabling traffic engineering

C.

Enabling network security

D.

Enhancing network resiliency

Question 28

Facility fast reroute with node protection is enabled for an LSP, which of the following is FALSE?

Options:

A.

Each PLR signals a bypass tunnel that avoids the next-hop downstream router.

B.

When a failure occurs, the PLR pushs an additional label onto the label stack.

C.

No bypass tunnel is established if the PLR cannot provide node protection.

D.

The head-end router sets the local protection desired flag in the session attribute object.

Question 29

To enable the LDP-over-RSVP feature, which of the following configurations is NOT required on an Alcatel-Lucent 7750 SR?

Options:

A.

Enable the Idp-over-rsvp feature on all PEs and ABRs along the LSP tunnel.

B.

Configure Link-LDP sessions between each PE-ABR and ABR-ABR pair.

C.

Configure RSVP-TE LSPs in each area between each PE-ABR and ABR-ABR pair.

D.

Configure T-LDP sessions with the tunneling option.

Question 30

Which of the following about CSPF is TRUE?

Options:

A.

The tail-end router performs the CSPF calculation for an LSP.

B.

CSPF calculations are always performed on RSVP-TE based LSPs.

C.

The head-end router performs the CSPF calculation for an LSP.

D.

Each downstream router performs its own CSPF calculation for an LSP.

Question 31

On a point-to-point link, two directly connected routers set different interface hello timeout values. Router R1 uses 15 seconds, while router R2 uses 30 seconds. What happens to the LDP adjacency?

Options:

A.

The adjacency forms with the lower timeout value

B.

The "show router Idp session" command output displays the adjacency in state "init"

C.

The adjacency forms with the higher timeout value

D.

The adjacency times out after 30 seconds

Question 32

What is the common usage of the MPLS EXP bits?

Options:

A.

Each implementation can use them as they see fit.

B.

They are used to carry the Ethertype value.

C.

They are used to carry the TTL value.

D.

They are used to carry QoS classification.

E.

They are used to carry fragmentation flag information

Question 33

Click on the exhibit button below.

Assuming that LSP R1-R2-R3 requests the default fast reroute configuration, which router becomes a DMP for the detour tunnels?

Options:

A.

Router R1

B.

Router R2

C.

Router R3

D.

Router R4

E.

Router R5

Question 34

Which of the following statements regarding RSVP path messages on an Alcatel-Lucent SR is true?

Options:

A.

The path message's IP header options field sets the router alert option.

B.

The IP header source address is the sender's egress interface address.

C.

The IP header destination address is the next-hop interface address.

D.

The IP header HOP object reflects the upstream router's egress interface address.

Question 35

You wish to build an LSP originating on router R1, transiting the path R1-R2-R4-R5-R6, and terminating on router R6. How many strict hops would you define in your path statement?

Options:

A.

4

B.

1

C.

5

D.

6

Question 36

When configuring an LSP for fast reroute one-to-one protection, which of the following statements is true?

Options:

A.

The LSP can also use facility backup.

B.

The LSP is limited to node protection.

C.

You cannot request bandwidth on the protected LSP.

D.

Node protection can be disabled.

Question 37

Which of the following reservation styles can be used to prevent both the primary and secondary paths from booking resources on a common link?

Options:

A.

Fixed filter

B.

Shared explicit

C.

Standby explicit LSP

D.

Preemptive filter

E.

Link capacity filter

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Demo: 37 questions
Total 249 questions
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