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4A0-106 Exam Dumps - Nokia Virtual Private Routed Networks

Question # 4

Which of the following statements best describes the output from an Nokia 7750 SR shown below?

A.

The BGP session from PE to P is not operational

B.

The BGP session between PEs is operational

C.

The BGP session between PE and CE is not operational

D.

The BGP session from PE to CE is operational

E.

The BGP session between PEs is not operational

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Question # 5

Based on the VPRN BGP decision process, which of the following routes is selected first?

A.

The route with the lowest MED.

B.

The route with the shortest AS Path.

C.

The route received from the lowest peer IP address.

D.

The route with the lowest Origin.

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Question # 6

In a VPRN, what type of logical topology is required for the BGP sessions configured in the provider core?

A.

Full mesh between all CE, PE and P devices

B.

Full mesh between PE and P devices

C.

Full mesh of P devices

D.

Full mesh of PE devices

E.

Full mesh between PE and CE devices

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Question # 7

Which of the following commands on an Nokia 7750 SR will verify connectivity for a VPRN service when issued from the PE?

A.

oam vprn-ping source destination

B.

oam vprn-ping source destination

C.

vprn-ping router

D.

Ping source

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Question # 8

In a provider core consisting of 6 PE and 4 P routers, what is the minimum number of BGP sessions required in total for correct operation of VPRN services?

A.

0

B.

5

C.

10

D.

15

E.

45

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Question # 9

For Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT applicable to both types of customer carriers: BGP/MPLS service providers and Internet service providers?

A.

eBGP is used for route and label exchange between CSC-CE and CSC-PE routers.

B.

iBGP can be used to distribute routes between CSC-CE and PE routers.

C.

MP-iBGP is used to advertise routes between the CSC-PE routers.

D.

MP-iBGP is used to advertise end-customer and Internet routes directly between the PE routers.

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Question # 10

What is the purpose of the Route Distinguisher?

A.

It defines the VPN membership

B.

It defines which routes are imported into the vrf

C.

It defines which routes are exported from the vrf

D.

It is used to make IPv4 addresses unique

E.

It is used as the VPN label

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Question # 11

Click the exhibit.

For the Carrier Supporting Carrier (CSC) VPRN, which routes are advertised between CSC-CE1 andCSC-PE1?

A.

VPN-IPv4 routes for all PE system addresses in AS 1000

B.

BGP labeled IPv4 routes for all PE system addresses in AS 1000

C.

VPN-IPv4 routes for all PE system addresses in AS 5000

D.

BGP labeled IPv4 routes for all PE system addresses in AS 5000

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Question # 12

Click the exhibit.

An extranet VPRN is configured on Nokia 7750 SRs. On which router(s) should the displayed configuration be applied?

A.

Router R1

B.

Router R2

C.

Routers R1 and R2

D.

Router R3

E.

Router R4

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Question # 13

Which of the following is a benefit of a hub and spoke VPRN topology?

A.

Reduced number of VPN tunnels that need to be managed.

B.

Optimal routing between all sites.

C.

Limited configuration required on the hub PE device.

D.

Site to site redundancy support.

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Question # 14

Which of the following statements is true regarding the Route Distinguisher? (Choose three)

A.

It is an 8 byte value containing 3 fields

B.

The Route Distinguisher must have the same value as the Route Target.

C.

The Administrator field contains either an AS number or an IP number

D.

To ensure uniqueness, Route Distinguishers are assigned by the IANA.

E.

The Route Distinguisher is not used if the customer addresses do not overlap

F.

The Assigned Number field must contain a public IP address

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Question # 15

You are configuring a VPLS spoke termination to a VPRN on an Nokia 7750 SR. If LDP is used for all transport tunnels, what type of sessions are established by the VPRN PE router that is configured with the spoke termination?

A.

T-LDP and LDP sessions with the other VPRN PE routers and the VPLS PE router

B.

T-LDP sessions with the other VPRN PE routers and the VPLS PE router

C.

LDP sessions with the other VPRN PE routers and the VPLS PE router

D.

LDP sessions with the other VPRN PE routers, and both T-LDP and LDP sessions with the VPLS PE router

E.

T-LDP and LDP sessions with the other VPRN PE routers and LDP sessions with the VPLS PE router

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Question # 16

When an Nokia 7750 SR receives a BGP update containing an AS-Path loop, what is the default action?

A.

The update is accepted and the route installed in the route table.

B.

The update is accepted but the route will not be installed in the route table

C.

The update is rejected

D.

The peer session is dropped

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Question # 17

Which of the following about the maximum number of routes that can be accepted in a VRF for a VPRN service on the Nokia 7750 SR is FALSE?

A.

The Nokia 7750 SR allows the setting of the maximum number of routes that can be accepted in a VRF for a VPRN service.

B.

The "maximum-routes" command is used to specify the maximum number of remote routes that can be held within a VRF for a VPRN service.

C.

When the "maximum-routes" command is used with the "log-only" parameter, new routes are still learned.

D.

Once the "threshold" value is reached, no new routes are added to the VRF.

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Question # 18

In a traditional layer 3 VPN which of the following will be an issue when there is overlapping address space between two customers? Choose the best answer.

A.

There will be increased memory usage on the PE

B.

There will be increased CPU utilization on the PE

C.

The CE will reject the overlapping prefix

D.

The PE will not recognize the prefixes as being different

E.

There is no issue with overlapping address space in a traditional Layer 3 VPN

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Question # 19

Which of the following about inter-AS model B VPRN is FALSE?

A.

Model B does not require the configuration of VPRN instances on ASBRs.

B.

The ASBRs peer with each other to transport VPN-IPv4 routes between autonomous systems.

C.

PE routers distribute VPN-IPv4 routes to their local ASBR.

D.

One single ASBR is required in each AS to hold the routes for all VPRNs.

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Question # 20

Click the exhibit.

Routers RR1 and RR2 are configured as route reflectors. For the inter-AS model C VPRN, which of the following about the VPN-IPv4 route advertisement is FALSE?

A.

RR2 advertises the VPN-IPv4 route update of 192.2.1.0/27 to RR1

B.

RR1 advertises the VPN-IPv4 route update of 192.1.1.0/27 to RR2

C.

RR2 advertises the VPN-IPv4 route update of 192.1.1.0/27 to PE2

D.

PE1 advertises the VPN-IPv4 route update of 192.1.1.0/27 to RR1 and ASBRL

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Question # 21

Which of the following statements is FALSE when providing Internet access using route leaking between a VRF and the global routing table?

A.

It is best used when a single VPN is required to provide Internet access, as well as to maintain VPN connectivity between different customer sites.

B.

If there is no requirement for the VRF to contain the full Internet routing table, a default route to the Internet gateway router is sufficient.

C.

Only one interface on the CE is required for both VPN and Internet connectivity.

D.

The Nokia 7750 SR supports route leaking in full mesh and extranet VPRN topologies only.

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Question # 22

Which of the following statements about the control plane in Carrier Supporting Carrier (CSC) VPRN is FALSE?

A.

The customer carrier does not learn any network provider routes.

B.

The network provider must learn the customer carrier PE and CE system addresses.

C.

Routes exchanged between CSC-CE and CSC-PE are labeled.

D.

The customer carrier PE system addresses are populated in the CSC VRF.

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Question # 23

VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A.

A 64-bit Route Target followed by a 32-bit IPv4 address.

B.

A 64-bit Route Distinguisher followed by a 32-bit IPv4 address.

C.

A 32-bit Route Distinguisher followed by a 32-bit IPv4 address.

D.

A 32-bit Route Target followed by a 32-bit IPv4 address.

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Question # 24

If Route Reflector 1 (RR1) is used for Internet routes, and Route Reflector 2 (RR2) is used for VPN routes, which of the following is TRUE?

A.

BGP sessions established between RR2 and the PEs support IPv4 and VPN-IPv4 address families.

B.

BGP sessions established between RR1 and the PEs support the IPv4 address family only.

C.

BGP sessions established between RR1 and the PEs support IPv4 and VPN-IPv4 address families.

D.

BGP sessions established between RR2 and the PEs support the IPv4 address family only.

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Question # 25

Based on the VPRN BGP decision process, which of the following routes is selected first if the command "PE1>config>service>vprn> bgp best-path-selection as-path-ignore" is executed?

A.

The route learned from an eBGP peer.

B.

The route with the lowest Origin.

C.

The route with the lowest originator ID or BGP Identifier.

D.

The route with the shortest AS path.

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Question # 26

Click the exhibit.

For the Inter-AS model B VPRN, which of the route updates for prefix 192.168.1.0/27 is incorrect?

A.

The route update sent from PE1.

B.

The route update sent from PE2.

C.

The route update sent from ASBR1.

D.

The route update sent from ASBR2.

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Question # 27

Which of the following about a full mesh VPRN design is FALSE?

A.

Each customer site has a logically direct route to every other customer site.

B.

It provides optimal routing between all sites.

C.

It allows access between all CE devices and all sites participating in the same VRF.

D.

It requires a full BGP mesh in the provider core.

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Question # 28

Based on the VPRN BGP decision process, which of the following routes is selected first?

A.

The route with the shortest AS path.

B.

The route with the lowest route or tunnel table cost to the NEXT_HOP.

C.

The route with the highest local preference.

D.

The route with the lowest originator ID or BGP identifier.

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Question # 29

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. If CE1 sends an IP packet to 192.168.200.1, which of the following is FALSE?

A.

PE1 pushes a VPN label, a BGP label, and an LDP transport label on the IP packet.

B.

CSC-CE1 pops the LDP label and swaps the BGP label.

C.

CSC-PE1 pops the BGP label, swaps the VPN label, and pushes an LDP transport label.

D.

CSC-PE2 pops the LDP and VPN labels and pushes a BGP label.

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Question # 30

Which of the following about the configuration of an inter-AS model C VPRN is FALSE?

A.

MP-iBGP sessions must be configured between the PE routers in each AS.

B.

LDP must be configured in each AS.

C.

MP-eBGP sessions must be configured between the ASBRs.

D.

The ASBRs must be configured with "enable-inter-as-vpn".

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Question # 31

For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internet connectivity to its end-customers, which of the following is FALSE?

A.

Customer carrier PE routers residing in different sites must run iBGP between them to exchange customers' routes.

B.

MPLS can be used in the customer carrier network to improve scalability.

C.

The customer carrier network can be a pure IP network.

D.

A CSC VPRN is configured on the CSC-CE to forward data packets to the network provider.

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Question # 32

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Nokia 7750 SR for a customer carrier who is an Internet Service Provider (ISP). Which of the following configuration steps is NOT required?

A.

Configuring iBGP sessions between PEs residing in different customer carrier sites.

B.

Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.

C.

Configuring a CSC VPRN on each CSC-PE with a SAP interface towards the attached CSC-CE.

D.

Configuring an IES service on PEL

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