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Nokia Services Architecture Questions and Answers

Question 1

Customer 'A' has sites on 3 different Alcatel-Lucent PE routers. The routers are connected to each other through an IP/MPLS network in a full mesh fashion. Customer 'A' requires a VPLS service. Which of the following statements are TRUE? (Choose2)

Options:

A.

Each router requires 1 VPLS service.

B.

Each router requires 2 VPLS services.

C.

Each router requires 1 SDP with 2 LSPs, one to each of the other 2 routers.

D.

Each router requires 2 SDPs.

E.

Each router requires 3 SDPs

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Question 2

Which of the following is NOT a VPWS service supported on the Alcatel-Lucent 7750 SR?

Options:

A.

Epipe

B.

Fpipe

C.

Apipe

D.

Ipipe

E.

Cpipe

F.

Gpipe

Question 3

Which VPWS service would be used to create a point-to-point Frame Relay service?

Options:

A.

Epipe

B.

Apipe

C.

Fpipe

D.

Ipipe

E.

Cpipe

Question 4

On Alcatel-Lucent 7750 SR OS, routing information between the CE and PE can be exchanged using the following methods.

Options:

A.

ISIS, RIP, OSPF, static routes

B.

BGP, ISIS, RIP, OSPF, static routes

C.

BGP, RIP, OSPF, static routes, OSPF3

D.

ISIS, RIP, OSPF, static routes, OSPF3

Question 5

Which of the following statements best describes a route target?

Options:

A.

A route target is a BGP extended community used to identify the VRF table for a prefix at the receiving PE

B.

A route target is a mechanism from which VPRN controls the distribution of VPN routing information.

C.

Route target attributes are earned in a MP-BGP as attributes of the route.

D.

A route target is used by the PE router to identify the VRF that a VPN-lPv4 prefix is associated with.

E.

All of the above statements describe a route target

F.

None of the above statements describe a route target

Question 6

What can the sdp-ping command be used for? (Choose 2)

Options:

A.

To test the ability of reaching the far-end IP address of an SDP within the SDP encapsulation

B.

To determine the path MTU to the far-end IP address over an SDP.

C.

To determine the service MTU of the service using an SDP.

D.

To determine the presence of hosts using the service

Question 7

3 Epipe services and 2 VPLS services have been configured between two PE routers. How many service labels will be signaled in total?

Options:

A.

2

B.

3

C.

4

D.

5

E.

6

F.

10

Question 8

What is the default vc-type for an SDP on the Alcatel-Lucent 7750 SR?

Options:

A.

vc-type null

B.

vc-type ether

C.

vc-type vlan

D.

vc-type none

Question 9

Click on the exhibit button below.

Is a routing policy required on PE1 to advertise a CE1's system interface to PE2?

Options:

A.

Yes. A routing policy is required to advertise routes between PE routers in a VPRN

B.

No. A routing policy is not required; the default behavior on the 7750 SR is to advertise all VPRN routes between PE routers.

C.

A routing policy is required only when BGP is used as the PE-CE routing protocol, as shown in the exhibit.

D.

A CE1 system interface can not be advertised to PE2 since the CE routers are not aware of the VPRN.

Question 10

What is the minimum Ethernet physical network MTU required for a Layer 2 service on an MPLS encapsulated SDP with a service MTU of 1518?

Options:

A.

1520

B.

1540

C.

1548

D.

1556

Question 11

Click the exhibit.

Assuming CE1 exports its system address using BGP, is a routing policy required on PE1 to advertise CE1's system address to PE2?

Options:

A.

Yes, A routing policy is required to advertise routes between PE routers in a VPRN regardless of the CE-PE routing.

B.

Yes, A routing policy is required in this case because BGP is used as the PE-CE routing protocol.

C.

No, a routing policy is not required. By default, the Alcatel-Lucent 7750 SR will advertise all VPRN routes between PE routers.

D.

No, a routing policy is not required on PE1, but an import policy is required on PE2.

Question 12

Which of the following about VPRN VRF tables is FALSE?

Options:

A.

Each VRF table contains routes for a single VPRN.

B.

Route targets are used to determine if a prefix belongs to a VRF.

C.

Routes in the VRF table are advertised to the core routers.

D.

VPN labels identify which VRF table should be used for a packet.

Question 13

Which of the following about the Alcatel-Lucent 7750 SR svc-ping, when used in-band, is FALSE?

Options:

A.

It will show the hops taken between service endpoints.

B.

It will test the delay across the service.

C.

It will test the SDPs of a service in both directions.

D.

It will test the round-trip connectivity of the service.

Question 14

Which of the following about the label stack of a VPRN is FALSE?

Options:

A.

The service label is swapped for a transport label during transport.

B.

The transport label is used to forward packets between PEs.

C.

The service label is used to identify which VPRN a packet belongs to.

D.

Labels are initially added at the ingress PE.

Question 15

Which of the following about the VPN-IFV4 address family is FALSE?

Options:

A.

VPN-IFV4 allows multiple customers to have overlapping IP addresses.

B.

CE routers use VPN-IPv4 prefixes to differentiate between services.

C.

PE routers are responsible for creating VPN-IPv4 prefixes.

D.

A VPN-IFV4 prefix is composed of a route distinguisher (RD) and an IPv4 address.

Question 16

The SAP 1/1/1:2.3 receives an Ethernet frame with outer VLAN tag 5 and inner VLAN tag 3. Which of the following is TRUE?

Options:

A.

The frame is dropped.

B.

The frame's outer tag is changed to match the SAP, and it is accepted.

C.

The frames outer tag is dropped, and the frame is accepted.

D.

The frame's tags are removed, and the frame is accepted.

Question 17

On the Alcatel-Lucent 7750 SR, which of the following statements about MP-BGP used for a VPRN is TRUE?

Options:

A.

Routes from different customers with the same IPv4 address prefix are treated as equivalent by MP-BGP.

B.

MP-BGP will advertise routes to other BGP sessions on the same PE without the need of policies.

C.

The multi-protocol nature of MP-BGP allows VPRN routes to be converted into IPv4 routes in the provider core network.

D.

MP-BGP is an enhanced version of BGP that can carry customer route prefixes for multiple VPRNs.

Question 18

Click the exhibit. This output is from router R4. Service 333 is a VPLS. Why might the peer 10.10.10.1 have the same value for IngLbl and EgrLbl?

Options:

A.

The labels are of local significance only, so other routers can use the same value.

B.

10.10.10.1 has yet to send its own unique label.

C.

Router R4 is using the same tunnel to send and receive to 10.10.10.1.

D.

The service on 10.10.10.1 is down, so it is rejecting packets.

Question 19

What command syntax would be used to create a new routed interface on an existing IES service?

Options:

A.

config>service>ies# interface "to-CE" customer customer-id create

B.

config>service>ies# interface to CE create

C.

config>service>ies# interface to CE

D.

config>service>ies# interface "to-CE" create

Question 20

An operator wishes to verify end-to-end connectivity for an individual service. What utility will he or she most likely use?

Options:

A.

sdp-ping

B.

Isp-ping

C.

svc-ping

D.

sdp-mtu

Question 21

By default, what does an Alcatel-Lucent 7750 SR do to support VPLS services for different customers?

Options:

A.

Dedicates a separate port for each customer.

B.

Performs ARP look-ups for each service.

C.

Maintains a different IP routing table for each service.

D.

Maintains a different MAC Forwarding Database for each service.

Question 22

A SAP configured in the form of 1/1/1:0/32 would be used for which type of VPWS?

Options:

A.

A-pipe

B.

C-pipe

C.

E-pipe

D.

F-pipe

Question 23

Which of the following statements best describes how an FDB is populated with MAC addresses in a VPLS service?

Options:

A.

A VPLS service does not use an FDB.

B.

The router reads the destination MAC address of packets passing through the service.

C.

The router reads the source MAC address of packets passing through the service.

D.

The router uses reverse ARP (RARP) to resolve the MAC addresses for unknown destinations.

E.

The router is programmed with MAC addresses by the network administrator.

Question 24

What is the best approach of making MTUs match between a VPLS and a spoke IES in order to bring up the service?

Options:

A.

Change the service MTU of the VPLS to match the IES.

B.

Set the ip-mtu of the IES service to match the service MTU of the VPLS service.

C.

Change the MTU of the SDP attached to the VPLS to match the service MTU of the VPLS.

D.

Set the DNF flag on the IES service.

Question 25

Consider an E-pipe service configured with SAP 1/1/1:5 and SAP 1/1/1:6. If the SAP 1/1/1:5accepts an ingress frame, which of the following is TRUE?

Options:

A.

The frame egresses from 1/1/1:6 with no VLAN tag.

B.

The frame egresses from 1/1/1:6 with VLAN tag 5.

C.

The frame egresses from 1/1/1:6 with VLAN tag 6.

D.

The frame egresses from 1/1/1:6 with an inner VLAN tag of 5 and an outer VLAN tag of 6.

Question 26

Why must the MTU be changed when configuring an IES spoke termination to a VPLS?

Options:

A.

The default service MTU on a VPLS service is 1514 bytes.

B.

The default IP MTU of an IES is set based on the network port MTU.

C.

During VC label signaling, the VC MTU is verified and must match.

D.

All of the above.

Question 27

Which of the following about SDPs is FALSE?

Options:

A.

Spoke SDPs prevent loops in a VPLS.

B.

Mesh SDPs and spoke SDPs can be used in the same VPLS.

C.

A spoke SDP does not require the routers at both ends to be directly connected.

D.

A mesh SDP is identical to a spoke SDP except for its flooding behavior.

Question 28

Epipe services do no consume any MAC resources because MAC learning is disabled.

Options:

A.

TRUE

B.

FALSE

Question 29

Fragmentation is supported on a Layer 2 service

Options:

A.

TRUE

B.

FALSE

Question 30

Which of the following commands is used to configure a new MPLS SDP?

Options:

A.

configure router sdp sdp-id

B.

configure service sdp sdp-id create

C.

configure service mpls sdp sdp-id create

D.

configure service gre sdp sdp-id create

E.

configure service sdp sdp-id mpls create

Question 31

What is the minimum Ethernet physical network MTU required for a Layer 2 service on a GRE encapsulated SDP with a service MTU of 1514?

Options:

A.

1514

B.

1526

C.

1548

D.

1556

E.

1536

Question 32

Which of the following best describes an IES?

Options:

A.

Layer 3 direct Internet access service.

B.

Layer 2 point-to-point service.

C.

Layer 2 multipoint-to-multipoint service.

D.

Layer 3 IP multipoint-to-multipoint VPN service.

Question 33

Which of the following best describes the label stack for a packet in the VPRN context?

Options:

A.

An outer label and a transport label.

B.

An inner label and a service label.

C.

A transport label and a service label.

D.

An MPLS transport label

Question 34

Which protocol is used to signal the outer label for a VPN service?

Options:

A.

RSVP

B.

IPCP

C.

TLDP

D.

PPP

E.

Either RSVP or LDP

Question 35

Which of the following are characteristics of an IES service? (Choose 2)

Options:

A.

A virtual routing/forwarding table is created per IES service.

B.

Only one IES service can be created for a single customer ID.

C.

More than one IP interface can be created within a single IES service.

D.

All IP interfaces created within the same IES service belong to the same customer

Question 36

What needs to be configured before a SAP appears? (Choose 2)

Options:

A.

Configuring the physical port in access mode.

B.

Configuring the physical port in network mode.

C.

Enabling the port using the no shutdown command.

D.

Ports are enabled by default, thus no need to use the no shutdown command.

Question 37

What Alcatel-Lucent 7750 SR OAM tool can be used to verify the end-to-end connectivity of a service?

Options:

A.

Sdp-ping

B.

Isp-ping

C.

Svc-ping

D.

Sdp-mtu

Question 38

Which of the following about ADSPEC is FALSE?

Options:

A.

ADSPEC sets an SDP's MTU to the smallest MTU value found along the LSP path.

B.

RSVP must be enabled on all MPLS routers of a path to use ADSPEC.

C.

ADSPEC can automatically adjust the service MTU.

D.

ADSPEC can be enabled on individual LSPs.

Question 39

Which of the following about the Isp-ping command on the Alcatel-Lucent 7750 SR is FALSE?

Options:

A.

An echo request is sent based on the LSP's label stack.

B.

Echo reply packets may not take the same path as the LSP.

C.

The IP destination address is used to initiate echo requests,

D.

The test fails if the LSP is not operationally up.

Question 40

Click the exhibit.

Based on this output from PE router R1, how many other PEs are participating in the VPRN?

Options:

A.

0

B.

1

C.

2

D.

3

Question 41

Which of the following is NOT a benefit of "Hub and Spoke'' VPLS deployments?

Options:

A.

They reduce the number of SDPs that need to be configured.

B.

They can be used to work around physical topologies that prevent a fully meshed deployment.

C.

They prevent loops that can be introduced by mesh deployments.

D.

They can simplify the implementation of security policy enforcement and packet inspection.

Question 42

Which of the following about VPRN VRF tables is FALSE?

Options:

A.

A PE uses the same VRF table for all the VPRN services on it.

B.

A PE uses a VRF to maintain forwarding information.

C.

Information for VRFs can be advertised between PEs by MP-BGP.

D.

A PE uses a VRF to route traffic to CEs.

Question 43

Which utility on the Alcatel-Lucent 7750SR can be used to investigate an MPLS path?

Options:

A.

Isp-trace

B.

Idp-trace

C.

Sdp-ping

D.

Svc-ping

E.

Ping

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