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Nokia 4A0-106 Dumps

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Total 214 questions

Nokia Virtual Private Routed Networks Questions and Answers

Question 1

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

Options:

A.

PE1 pushes an LDP transport label.

B.

CSC-CE1 pops the LDP label and pushes a BGP label.

C.

CSC-PE1 pops the BGP label and pushes two labels: a VPN label and an MPLS transport label.

D.

CSC-PE2 pops the MPLS label and pushes a BGP label.

Question 2

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?

Options:

A.

CE1 forwards the data packet to PE1 via the VPRN 20 interface.

B.

PE1 pushes two labels on the IP packet: a BGP label and an LDP transport label.

C.

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

D.

CSC-PE1 pops the BGP label and pushes a VPN label and an MPLS transport label.

Question 3

Which of the following best describes the goal of an Extranet VPRN?

Options:

A.

Allow routes to be exchanged between all or selected sites of one VPRN and all or selected sites of a second VPRN

B.

Allow the service provider to provide multiple VPRNs with Internet access

C.

Reduce the number of VPRN tunnels required

D.

Simplify the administration of multiple VPRNs

E.

Force all traffic in multiple VPRNs to pass through a single device

Question 4

Which of the following about the configuration of VPRN Outbound Route Filtering (ORB on an Nokia 7750 SR is TRUE?

Options:

A.

The ORF configuration must be done under the BGP neighbor context only.

B.

When sending is enabled, the ORF function takes the route target list configured in all outbound policies and pushes this list to the peer by default.

C.

When configuring ORF, the session with the peer must be cleared/reset for the new capability negotiation to take place.

D.

When Outbound Route Filtering is configured, both the sending and acceptance of ORF are enabled by default.

Question 5

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

Options:

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

Question 6

What is the purpose of the Route Distinguisher?

Options:

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

Question 7

Which of the following protocols does the Nokia 7750 SR support to signal VPRN service labels?

Options:

A.

Targeted-LDP

B.

BGP

C.

MP-BGP

D.

RSVP-TE

Question 8

What command is required to configure the PE devices for a VPRN service on an Nokia 7750 SR?

Options:

A.

Family vpn-ipv4

B.

Family vprn-ipv4

C.

Family vprn

D.

Address-family vpn-ipv4

E.

Address-family vprn-ipv4

F.

Address-family vprn

Question 9

Choose the best answer to describe the result of the configuration of an Nokia 7750 SR shown below?

Options:

A.

The PE will install a maximum of 40 prefixes into the customer vrf and generate a log message when 40 routes are received

B.

The PE will install a maximum of 40 prefixes into the customer vrf, and generate a log message both when 30 and 41 routes are received

C.

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and disable learning of new routes at 41

D.

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and drop the connection at 41

E.

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 4 routes are received and disable learning of new routes at 41

Question 10

Complete the following statement. In a VPRN, the label signaled by RSVP-TE is used to ______________.

Options:

A.

Identify the egress PE in the MPLS domain

B.

Signal the egress VPRN ID

C.

Identify the ingress PE in the MPLS domain

D.

Transport route updates between PEs

Question 11

Click the exhibit.

For the inter-AS model C VPRN, which of the following statements about a data packet sent from CE1 toCE2isTRUE?

Options:

A.

PE1 sends the data packet with three labels: the bottom label is a service label, the middle label is a BGP label, and the top label is an LDP label.

B.

ASBR1 sends the data packet with one label: the BGP label.

C.

ASBR1 sends the data packet with one label: the service label.

D.

ASBR2 sends the data packet with three labels: the bottom label is a service label, the middle label is a BGP label, and the top label is an LDP label.

Question 12

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

Options:

A.

Dual CEs connected to redundant PEs can provide redundancy within a single site.

B.

Site redundancy can be achieved by dual homing a single CE to one or more PEs.

C.

Provider core LSPs can be LDP-based or RSVP-based.

D.

The provider core maintains a full mesh of LSP tunnels and MP-BGP sessions between all P devices.

Question 13

Click the exhibit.

Community lists are configured for the PE hub and spoke VPRN. Which communities should be exported by the VPRN service on PE1?

Options:

A.

"Spoke.Sites" and "Hub_Site"

B.

"Spoke_Sites"

C.

"Hub_Site"

D.

No communities should be exported

Question 14

Click the exhibit.

For the PE hub and spoke VPRN, on which PE(s) should the VPRN service command target export target: 65100:1 import target: 65100: 2 " be configured?

Options:

A.

PE1

B.

PE2, PE3 and PE4

C.

PE1, PE2, PE3 and PE4

D.

This command is not required for the configuration of this PE hub and spoke VPRN.

Question 15

Click the exhibit.

An Nokia 7750 SR is to be configured as a core router that supports VPRNs using LDP as the transport protocol. Which of the following best describes this configuration?

Options:

A.

This configuration is correct and complete.

B.

This configuration is correct, but the interfaces must also be configured in the "configure router mpls" context.

C.

There is no configuration required for LDP in the core network.

D.

This configuration is correct but Targeted-LDP is also required.

Question 16

After configuring OSPF as the PE to CE routing protocol for a VPRN service you get the following output from an Nokia 7750 SR: What is most likely wrong with the configuration?

Options:

A.

OSPF is not configured on the CE router

B.

There is a problem with OSPF authentication

C.

The operational MTU does not match

D.

The PE and CE router have different OSPF interface types configured

E.

None of the above

Question 17

Click the exhibit.

For the Inter-AS model B VPRN, which of the following about the inter-as-label output on ASBR1 is TRUE?

Options:

A.

ASBR1 includes label 131069 in the route update sent to ASBR2.

B.

ASBR1 includes label 131068 in the route update sent to ASBR2.

C.

ASBR1 includes label 131068 in the route update sent to PEL

D.

ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.

Question 18

In inter-AS model C VPRN, which of the following about the command "advertise-label ipv4" is TRUE?

Options:

A.

This command is required on all PE routers to distribute labeled IPv4 routes directly to PEs in remote AS.

B.

This command is required on the ASBRs to exchange labeled IPv4 routes between the ASs.

C.

This command is required on the route reflectors to exchange customer routes between ASs as labeled IPv4 routes.

D.

This command is required on all PE routers to distribute labeled IPv4 routes to connected CEs.

Question 19

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

Options:

A.

Model B requires the configuration of back-to-back VRFs between the ASBRs in different autonomous systems.

B.

Model B is highly scalable because the VPN-IPv4 routes are neither maintained, nor distributed by, the ASBRs.

C.

There is a dependency between the route target used in different autonomous systems.

D.

Model B supports the exchange of labeled IPv4 routes between ASBRs.

Question 20

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

Options:

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.

Question 21

Click the exhibit.

For the CE hub and spoke VPRN, which of the following is FALSE?

Options:

A.

The primary VRF on PE1 contains routes learned from spoke sites.

B.

All traffic between spoke sites must pass through CE1.

C.

The secondary VRF on PE1 is used to route data packets from the hub CE to the spoke sites.

D.

PE1 advertises the primary VRF routes to CE1.

Question 22

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?

Options:

A.

Configuring labeled eBGP sessions between CSC-CE and CSC-PE routers.

B.

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

C.

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

D.

Advertising the received system addresses of remote PEs using either iBGP or IGP/LDP within each customer carrier site.

Question 23

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

Options:

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".

Question 24

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?

Options:

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.

Question 25

Community lists are configured for the PE hub and spoke VPRN.

Which communities should be imported by the VPRN service on PE1?

Options:

A.

“Spoke_Sites”

B.

“Hub_Site”

C.

“Spoke_Sites” and “Hub_Site”

D.

No communities should be imported.

Question 26

Which of the following is NOT a viable option when implementing inter-AS VPRN?

Options:

A.

An MP-eBGP session between route reflectors in different autonomous systems to exchange IPv4 routes.

B.

An MP-eBGP session between ASBRs to exchange labeled IPv4 routes.

C.

An eBGP session between ASBRs to exchange IPv4 routes.

D.

An MP-eBGP session between ASBRs to exchange VPN-IPv4 routes.

Question 27

Click the exhibit.

For the PE hub and spoke VPRN, which communities should be imported under the VPRN service on PE2?

Options:

A.

"Spoke.Sites" and "Hub_Site"

B.

"Hub_Site"

C.

"Spoke_Sites"

D.

No communities should be imported

Question 28

Which of the following statements about Inter-AS model В VPRN is TRUE?

Options:

A.

MP-iBGP is used between PE1 and ASBR1 to exchange VPN-IPv4 routes.

B.

eBGP is used between ASBR1 and ASBR2 to exchange IPv4 routes.

C.

MP-eBGP is used between PE1 and PE2 to exchange VPN-IPv4 routes.

D.

MP-eBGP is used between ASBR1 and ASBR2 to exchange labeled IPv4 routes.

Question 29

For the inter-AS model B VPRN, which of the following protocols is used to advertise routes between ASBR1 and ASBR2?

Options:

A.

iBGP

B.

eBGP

C.

MP-iBGP

D.

MP-eBGP

Question 30

Click the exhibit.

The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route targets should be exported under the VPRN 20 service on router R1?

Options:

A.

target:65100:2 and target:65100:3

B.

target:65100:1 and target:65100:2

C.

target:65100:1 and target:65100:3

D.

target:65100:1, target:65100:2 and target:65100:3

Question 31

Click the exhibit.

For the inter-AS model C VPRN, how many labels does PE1 push on a data packet received from CE1 and destined to CE2?

Options:

A.

1

B.

2

C.

3

D.

4

Question 32

What is wrong with the VPRN configuration applied on this Nokia 7750 SR?

Options:

A.

The VPRN ID must match the value 101 used in the vrf-target command.

B.

The VPRN ID must match the value 101 used in the route-distinguisher command.

C.

The router-id command should not be used in this context.

D.

The “no shutdown” command must be configured for the VPRN to be operationally UP.

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Total 214 questions