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4A0-C02 Nokia SRA Composite Exam Question and Answers

Question # 4

Which of the following about BGP loops in a VPRN environment is FALSE?

A.

Traditional BGP loop detection mechanisms may detect a loop in the VPRN scenario, which in fact is not present.

B.

The Alcatel-Lucent 7750 SR accepts routes containing AS_PATH loops by default.

C.

When the CLI command "config>router>bgp# loop-detect discard-route" is used, the Alcatel-Lucent 7750 SR sends a notification to the remote peer and drops the BGP session.

D.

In VPRN implementations where the CE-PE protocol is BGP, it is possible for separate sites of the same customer to use the same BGP autonomous system number.

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Question # 5

Click the exhibit.

For the extranet VPRN and community lists shown, which of the following communities will be included in the export policy applied to VPRN 20 on router R2?

A.

"Blue-Only"

B.

"Blue-Only" and "Blue-Green"

C.

"Green-Only"

D.

"Extranet-VPN-Green"

E.

"Blue-Green"

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Question # 6

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customer carrier offering VPRN services. Which of the following configuration steps is NOT required?

A.

Creating an export policy on CSC-CE1 and CSC-CE2 to advertise local PE addresses to the network provider.

B.

Configuring eBGP between CSC-CE and CSC-PE routers; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

C.

Configuring iBGP between PE and CSC-CE within each customer carrier site; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

D.

Configuring MP-iBGP between PE1 and PE2; setting the address family to IPv4; and enabling the advertisement of labels for IPv4 routes.

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Question # 7

Click the exhibit.

What is wrong with the VPRN configuration applied on this Alcatel-Lucent 7750 SR?

A.

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

B.

The VPRN ID must match the value 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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Question # 8

Click on the exhibit below.

The VPLS service MTU on R2 is 1514 bytes. What must the service MTU be on all other routers participating in the VPLS?

A.

The service MTU must be equal to or smaller than 1514 bytes.

B.

The service MTU must be 1514 bytes.

C.

The service MTU must be equal to or greater than 1514 bytes.

D.

The service MTU can be any value.

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Question # 9

How can one ensure that a specific switch will be select as root in an STP network?

A.

Set the bridge priority to 131071.

B.

Set the bridge priority to 0.

C.

Set the bridge priority to 32768.

D.

Leave the bridge priority as the default.

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Question # 10

Click on the exhibit below.

The MDU attached to this PE has been configured with active/standby SDP's configuration option has been configured for the PE to recognize that this SDP is in standby mode?

A.

On the PE the endpoint has been configured with "supress-standby-signalling"

B.

On the PE the endpoint has been configured with "no supress-standby-signalling"

C.

On the MDU the endpoint has been configured with "supress-standby-signalling"

D.

On the MDU the endpoint has been configured with "no supress-standby-signalling1

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Question # 11

Click on the exhibit below.

Assume PE-B expects avian tag as part of the RFC 4762 (Martini) encapsulation. How must PE-A be configured?

A.

The port that the SAP belongs to must have the correct ether type configured.

B.

The SAP must be configured with the right VLAN tag.

C.

The SDP VC type must be configured as type VLAN and the correct vlan-vc-tag must be specified.

D.

All of the above.

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Question # 12

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

A.

To reduce the number of VPRN tunnels required.

B.

To allow routes to be exchanged between all, or selected, sites of one VPRN, and all, or selected, sites of a second VPRN.

C.

To simplify the administration of multiple VPRNs.

D.

To allow network access between the headquarter sites of each VPRN service and a shared VPRN service offered by a third party.

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Question # 13

Click the exhibit.

The policy shown is configured on an Alcatel-Lucent 7750 SR to implement an extranet VPRN between the main sites of two separate VPRNs. Route target "target:65100:2" is used for Customer 1 routes, and route target "target:65100:3" is used for Extranet routes. How should this policy be applied?

A.

The policy should be applied as an import policy on the PE connected to the main site of Customer 1.

B.

The policy should be applied as an import policy on all the PEs connected to the sites of Customer 1.

C.

The policy should be applied as an export policy on the PE connected to the main site of Customer 1.

D.

The policy should be applied as an export policy on all the PEs connected to the sites of Customer 1.

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Question # 14

Click on the exhibit below.

The SAP on PE-A has been configured with dot1q encapsulation. The SAP on PE-B has been configured with qinq encapsulation. CE-A sends frames with a single tag of 100. The VLAN tag from CE-A must be passed transparently. CE-B is expecting a frame with a top tag of 200 and bottom tag of 100. Which of the following is the correct SAP id for PE-B?

A.

sap 1/1/1:200.100

B.

sap 1/1/1:200*

C.

sap 1/1/1:*

D.

sap 1/1/1:0*

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Question # 15

Click on the exhibit below.

Study the diagram shown. What consideration should be given to the transport tunnel of SDP 300?

A.

The SDP must be configured to use GRE encapsulation.

B.

The SDP must follow the same path as the user's SDP.

C.

The SDP should be configured to use an RSVP signaled transport with fast reroute.

D.

The SDP must be the same as the user's SDP.

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Question # 16

Which of the following protocols are supported by the Alcatel-Lucent 7750 SR for the creation of transport tunnels within an autonomous system?

A.

MP-BGP, LDP, RSVP-TE

B.

LDP, RSVP-TE, GRE

C.

MP-BGP, RSVP-TE, GRE

D.

MP-BGP, LDP

E.

MP-BGP only

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Question # 17

Click the exhibit.

Which of the following best describes the output?

A.

The AS-Path is not present because a policy is configured on PE2 to set it to null.

B.

The AS-Path is not present because a policy is configured on CE1 to set it to null.

C.

The AS-Path is not present because a policy is configured on PE1 to set it to null.

D.

The AS-Path is not present because VPN-IPv4 routes do not propagate the IPv4 AS-Path BGP attribute.

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Question # 18

Click the exhibit.

For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1 to 192.2.1.1?

A.

PE1 pushes two labels on the IP packet and forwards it to ASBR1.

B.

ASBR1 pops the LDP label, swaps the BGP label and forwards the IP packet to ASBR2.

C.

ASBR2 forwards the IP packet with two labels to PE2.

D.

PE2 pops the labels and forwards the unlabeled IP packet to its destination.

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Question # 19

Click on the exhibit below.

Based on the following configuration which VLANs will be managed by the management VPLS?

A.

VLANs 1-4094

B.

VLAN 0

C.

There is not enough information provided

D.

None, this is an invalid configuration

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Question # 20

What is the SA in the Ethernet frame used for by a layer 2 switch?

A.

MAC learning

B.

SA filtering

C.

Routing table population

D.

Frame forwarding

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Question # 21

A LAG is configured with LACP passive mode enabled. When will LACP packets be sent?

A.

On initialization and then every hello-interval.

B.

Only after receiving LACP packets.

C.

Every 1 second.

D.

Never.

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Question # 22

MC-LAG provides link and node protection from an MDU to 3 or more PE devices.

A.

TRUE

B.

FALSE

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Question # 23

Click on the exhibit below.

The following IP filter has been configured and applied to a SAP in a non-VPLS service. Which of the following statements is true?

A.

An error will be generated and the configuration will not be allowed.

B.

The filter entry will be ignored and traffic matching the criteria will be forwarded

C.

All traffic matching entry 20 will be dropped.

D.

Traffic matching entry 20 will be forwarded to sdp 100:1.

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Question # 24

Click on the exhibit below.

Which ports will become root ports? (Choose 3)

A.

Bridge B 1/1/3

B.

Bridge B 1/1/2

C.

Bridge C 1/1/2

D.

Bridge C 2/1/1

E.

Bridge D 1/1/1

F.

Bridge D 1/1/3

G.

Bridge E 1/1/1

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Question # 25

Which of the following describes the scope of the IEEE 802.3ah EFM standard? (Choose 3)

A.

Monitor and troubleshoot a point-to-point full-duplex link.

B.

Monitor and troubleshoot end-to-end services.

C.

Can be used at the core to trigger MPLS protection mechanisms when a physical failure detection is not possible.

D.

Should not be used at the core to trigger MPLS protection. BFD is the only method that can be used when physical failure detection is not possible.

E.

Valuable in the last-mile connection to the Service Provider demarcation device.

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Question # 26

What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?

A.

The frame will be flooded.

B.

The frame will be discarded.

C.

The frame will be fragmented.

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Question # 27

During the process of troubleshooting a VPLS problem the "oam mac-purge" command with "register" option was used to purge a MAC address from the FDB. Which of the following statements is true?

A.

Relearning of the MAC address that was purged can only be done once customer traffic resumes.

B.

Relearning of the MAC address that was purged can only be done with the "oam mac-populate" command.

C.

Customer traffic destined to the MAC address that was purged will be dropped until the MAC address is relearned with the "oam mac-populate" command.

D.

Relearning of the MAC address that was purged can only be done with the "oam mac-register" command.

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Question # 28

What is the result of initiating an oam mac-ping to an unknown unicast MAC address in a VPLS instance?

A.

The oam mac-ping will fail. The MAC address must be known in the local FDB to be successful.

B.

The request will be flooded and the only response will come from the PE node that has learned the specified MAC address on a local SAP.

C.

The request will be flooded and the CE device with the corresponding MAC will reply.

D.

All nodes will reply because the oam mac-ping is flooded.

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Question # 29

Click on the exhibit below.

In the diagram below, SAP 1 is put into the blocking state as a result of the spanning tree protocol. What will occur in the VPLS instance if SAP 2 goes down and SAP 1 transitions to the forwarding state? Select the most accurate statement.

A.

A Spanning Tree BPDU will be sent across the mesh flushing the FDB table in all devices participating in the VPLS instance.

B.

Stale information will be used within the VPLS instance to forward traffic until the FDB ages out.

C.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. Only MAC addresses associated with the PE that the failure occurred on will be flushed.

D.

An LDP control message will be sent to all devices in the mesh participating in the VPLS instance. The entire FDB in the VPLS instance will be flushed.

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Question # 30

How is the Primary Bridge chosen in a VPLS?

A.

The PE devices participating in the VPLS mesh run a separate Spanning Tree instance in the Core. The Primary Bridge is the Root Bridge for the VPLS mesh.

B.

The PE devices participating in the VPLS mesh determine which bridge is closest to Root Bridge. This bridge becomes the Primary Bridge.

C.

The PE devices participating in the VPLS mesh determine which bridge has the lowest bridge-id. This bridge becomes the Primary Bridge.

D.

The PE devices participating in the VPLS mesh determine which bridge is the Root Bridge. This becomes the Primary Bridge.

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Question # 31

Which of the following is a true statement?

A.

The lower the age-time, the greater the amount of flooding

B.

The higher the age-time, the greater the amount of flooding.

C.

The lower the age-time, the lower the amount of flooding.

D.

There is no relationship between the age-time and the amount of flooding.

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Question # 32

In Active/Standby pseudowires a failed pseudowire has recovered. Under what circumstances will the active pseudowire revert to the previously failed link?

A.

It will always revert to the previously failed link.

B.

It will never revert to the previously failed link.

C.

It will revert if the precedence of the previously failed link is set to 0 or "primary".

D.

It will revert if the precedence of the previously failed link is lower than the currently active link

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Question # 33

Which service component in the data plane uniquely identifies a VPLS to the far end PE node?

A.

SDP id

B.

Service ID

C.

VC Label

D.

Tunnel Label

E.

Customer id

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Question # 34

When spanning tree is enabled within a VPLS service and the STP mode is 802.1 D 2004 what happens if a PVST BPDU is received on a SAP?

A.

Spanning tree will be disabled on the SAP that the PVST BPDU was received on.

B.

The SAP that the PVST BPDU was received on will be disabled to prevent loops.

C.

The spanning tree encapsulation will be dynamically changed to PVST on the SAP the PVST BPDU was received on.

D.

The PVST BPDU will be ignored and 802.1D 2004 BPDUs will continue to be transmitted on the SAP.

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Question # 35

Click on the exhibit below.

Based on the service-mtu of this B-VPLS, what is the maximum service-mtu of any connecting I-VPLS attached to this B-VPLS?

A.

9100 bytes

B.

9104 bytes

C.

9108 bytes

D.

9118 bytes

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Question # 36

Which of the following must be true in order to add a port to a LAG? (Choose 2)

A.

ports must be on the same MDA

B.

ports must have the same speed and duplex settings

C.

auto negotiation must be on

D.

auto negotiation must be off or limited

E.

port must be in access mode only

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Question # 37

Click the exhibit.

The displayed output is from an ASBR supporting an inter-AS model A VPRN. Which of the following statements about this output is TRUE?

A.

The neighbor shown is an ASBR router.

B.

The address family between the peers should be VPN-IPv4 instead of IPv4.

C.

The neighbor address cannot be the interface address 10.3.4.4.

D.

The omitted AS number under "BGP summary" must be equal to 64496.

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Question # 38

Click the exhibit.

For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1 to 192.2.1.1?

A.

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

B.

ASBR1 pops the LDP and BGP labels and swaps the VPN label.

C.

ASBR2 pops the BGP label and pushes an LDP transport label.

D.

PE2 pops two labels and forwards the unlabeled packet to its destination.

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Question # 39

When VPRN Outbound Route Filtering (ORF) is enabled, each PE sends its ORF list to its peer using which of the following BGP message types?

A.

Open

B.

Update

C.

Route Refresh

D.

Notification

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Question # 40

Click the exhibit.

For the inter-AS model B VPRN, which of the following is the correct BGP configuration on ASBR1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 41

Complete the following statement. In a VPRN, the inner label is used to _______________.

A.

Identify the customer network on the egress PE

B.

Establish the LSPs between PE devices

C.

Identify the egress PE in the MPLS domain

D.

Identify the customer network on the ingress PE

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Question # 42

What are the two main benefits of a hub and spoke VPRN design? (Choose two)

A.

Reduced number of VPN tunnels that need to be managed

B.

Centralized filtering policies with the introduction of a hub site

C.

Optimal routing between all sites

D.

Limited configuration required on the hub PE device

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Question # 43

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 # 44

For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?

A.

Signaled via MP-BGP and used to identify the egress PE.

B.

Signaled via T-LDP and used to identify the customer VPRN.

C.

Signaled via MP-BGP and used to identify the customer VPRN.

D.

Signaled via RSVP and LDP and used to identify the egress PE.

E.

Signaled via RSVP and LDP and used to identify the customer VPRN.

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Question # 45

In a VPRN, which of the following are supported as PE-CE routing methods on the Alcatel-Lucent 7750 SR? (Choose four).

A.

Static

B.

RIP

C.

OSPF

D.

IS-IS

E.

MP-BGP

F.

BGP

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Question # 46

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

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

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Question # 47

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 # 48

In a VPRN the PE device is configured to run which of the following protocols? (Choose three.)

A.

MP-BGP for exchanging customer routes with other PEs

B.

A routing protocol for exchanging customer routes with the CE

C.

MPLS for exchanging labels with other provider core devices

D.

MPLS for exchanging labels with the CE devices

E.

Targeted LDP for exchanging VPRN labels with other PE devices

F.

A label signaling protocol for defining transport tunnels between PE and CE devices

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Question # 49

What is the maximum number of forwarding subclasses a forwarding class can have?

A.

3

B.

64

C.

72

D.

16

E.

56

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Question # 50

Which of the following statements describe the operation of WRED on the Alcatel-Lucent 7750 SR? (Choose three)

A.

WRED monitors the shared buffer space utilization over a period of time.

B.

WRED disables the TCP slow-start congestion control mechanism.

C.

WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.

D.

WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space.

E.

WRED polices the shared buffer pool and marks all packets above a certain rate as "discard eligible."

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Question # 51

WRED can be used to help avoid TCP slow-start synch problems.

A.

TRUE

B.

FALSE

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Question # 52

Which of the following statements are TRUE when discussing self-generated traffic QoS? (Choose two)

A.

In order to mark Layer 2 traffic, sgt-qos will set various ToS bits.

B.

DSCP bits can be set per application, per routing instance.

C.

The DSCP marking stays nc1 for all applications. Only the internal FC is manipulated across different applications.

D.

In order to mark Layer 2 self-generated traffic, network interfaces must be set to dot1Q.

E.

The internal forwarding class for self-generated traffic is set once and applied to the base router and all VPRN instances.

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Question # 53

In the context of hierarchical scheduling, a scheduler is configured with a CIR weight of 0. Which of the following statements is TRUE?

A.

The scheduler will be allocated its "within CIR" bandwidth before all other children at the same level have received their "within CIR" bandwidth.

B.

The scheduler will be allocated its "within CIR" bandwidth after all other children at the same level have received their "within CIR" bandwidth.

C.

The scheduler will be allocated its "within CIR" bandwidth after all other children at all levels have received their "within CIR" bandwidth.

D.

The scheduler will not be allocated its "within CIR" bandwidth.

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Question # 54

How many bits does DSCP use to provide QoS marking options?

A.

8

B.

16

C.

6

D.

4

E.

3

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Question # 55

Which of the following statements are TRUE regarding the building of a QoS-enabled network? (Choose two)

A.

It is important that all packets are classified in the same way at all SAP-ingress points.

B.

Once a packet is classified to a forwarding class, it cannot change across the network.

C.

Packet enters a node will be treated as per the local hop's configured policy.

D.

Native IP packets entering a network port will be marked at the first network egress by default

E.

Native IP packets entering a network port will not be marked at the first network egress by default.

F.

Native IP packets entering a network port will be marked at the first network egress, regardless of the re-marking configuration.

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Question # 56

Click the exhibit button below.

Based on the configuration shown below, name the forwarding class to be associated with a TCP packet encapsulated inside an Ethernet frame that arrives on SAP 1/1/5 with the following characteristics:

Destination IP address = 120.110.1.1

TCP port number = 23

DSCP value = nc1

Dot1pvalue = 3

A.

H2

B.

NC

C.

L2

D.

EF

E.

H1

F.

BE

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Question # 57

Which of the following is a feature of LDP VPLS?

A.

Service labels are assigned based used on label blocks.

B.

BGP-AD, RADIUS and Management are used for auto-discovery.

C.

Service labels are signaled using MP-BGP.

D.

Hierarchical VPLS is loosely defined in the standards.

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Question # 58

On an Alcatel-Lucent IOM 3, how is buffer memory allocated per forwarding complex?

A.

512 MB ingress, 512 MB egress

B.

256 MB ingress, 256 MB egress

C.

1 GB dynamically allocated between ingress and egress.

D.

768 MB dynamically allocated between ingress and egress.

E.

768 MB, with a minimum of 256 MB ingress and egress, and an additional 256 MB dynamically allocated.

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Question # 59

Which of the following are possible criteria for classifying packets at the network port ingress on the Alcatel-Lucent 7750 SR? (Choose three)

A.

The EXP bits in the MPLS header.

B.

The packet's source and destination IP addresses.

C.

The packet's DSCP bits.

D.

The dot1p bits in the frame header.

E.

The ID of an SDP that is transporting the packet.

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Question # 60

If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

A.

TRUE

B.

FALSE

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Question # 61

Which of the following BEST describes a SAP when regarding QoS?

A.

A point in the network where EXP bits can be mapped to one of eight predefined FCs, each one with its own queue.

B.

A logical point in a service tunnel where all of customer traffic is aggregated.

C.

A point at which the initial classification of customer traffic occurs.

D.

A point in the network where QoS parameters are discarded in favor of lower-level hardware queuing functions, such as LLI (Link Layer Interleave).

E.

A point in the network where traffic flows from multiple different services are queued together, based on forwarding class.

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Question # 62

Which of the following fields can be marked or remarked for frames belonging to a Layer 2 service?

A.

DSCP

B.

PREC

C.

Dot1p

D.

ToS

E.

Q-in-Q

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Question # 63

Which of the following statements about a Management VPLS is FALSE?

A.

Operates in transparent mode.

B.

Carries RSTP BPDUs only.

C.

Assigns RSTP state to other VPLS services.

D.

Allows load balancing among multiple management VPLS instances.

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Question # 64

A default network policy is applied to all router interfaces associated with network ports.

A.

TRUE

B.

FALSE

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Question # 65

In the image shown above, the SAP-ingress policy is applied properly to a Nokia 7750 SR. A traffic stream is received from an IP address of 192.168.1.1 with DSCP set to EF. Which forwarding class and priority level is used for this traffic stream?

A.

FC H1, high

B.

FC EF, high

C.

FC H2, low

D.

FC EF, low

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Question # 66

Which priority-mode queue parameter may influence both the profile marking, and scheduling priority of a queue?

A.

PIR

B.

CIR

C.

MBS

D.

burst-limit

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Question # 67

Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?

A.

Set the CBS to 0.

B.

Set the MBS equal to the CBS.

C.

Set the high-priority-only equal to the MBS.

D.

Set the MBS to 0.

E.

Set the high-priority-only to 0.

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Question # 68

Which of the following statements regarding buffer pool allocation are FALSE? (Choose two)

A.

Each network egress port receives its own buffer pool.

B.

Each SAP-egress port receives its own buffer pool.

C.

All SAP-ingress ports on the same MDA share a buffer pool.

D.

All the network ingress ports on the same MDA share a buffer pool.

E.

Each network ingress port on the same MDA receives its own buffer pool.

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Question # 69

Click the exhibit button below. Given the output of the #show pools 1/2/2 network-egress command on a GigE port, what can the service provider deduce? (Choose two)

A.

QoS is not configured on the router.

B.

Packets in forwarding classes "be" and "12" are being queued.

C.

Traffic belonging to forwarding class "ef" is not experiencing queuing delays.

D.

Traffic belonging to forwarding class "11 "will never make use of the shared buffer pool.

E.

Out-of-profile traffic in the shared buffer pool is being dropped.

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Question # 70

Which of the following statements BEST defines policing?

A.

The process of delaying packets within a traffic stream to have them conform to a defined traffic profile.

B.

The overall treatment of a defined subset of a customer's traffic within a DiffServ domain.

C.

The process of discarding packets within a traffic stream in accordance with the state of a meter to enforce a defined traffic profile.

D.

The action of setting the DiffServ codepoint of a packet prior to its entry into a downstream DiffServ domain.

E.

A specified algorithm or operation that is implemented in a node in order to realize one or more per-hop behaviors.

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Question # 71

With hierarchical scheduling, up to ___________ tiers are supported on the Alcatel-Lucent 7750 SR.

A.

8

B.

3

C.

4

D.

5

E.

6

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Question # 72

Individual application streams are considered microflows, whereas __________ are considered macroflows.

A.

SAPs

B.

SDPs

C.

Services

D.

Queues

E.

Schedulers

F.

Forwarding classes

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Question # 73

Which of the following behaviors regarding the modification of BGP attributes within a confederation is TRUE?

A.

Next Hop is modified when crossing member AS boundaries within a confederation.

B.

Origin Code is modified when crossing member AS boundaries within a confederation.

C.

AS Path is modified when crossing member AS boundaries within a confederation.

D.

None of the well known mandatory attributes is modified within a confederation.

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Question # 74

Which of the following statements regarding Internet Exchange Points is FALSE?

A.

They provide both peering and transit services.

B.

They provide services only to Tier 1 service providers.

C.

They can be either public or private.

D.

They provide services at the local, regional and continental levels.

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Question # 75

Which of the following regarding the TTL of a BGP message is TRUE?

A.

TTL is a well-known mandatory BGP attribute.

B.

The default TTL value of an eBGP message is 1, and 64 for an iBGP message.

C.

The default TTL value of an iBGP message can be modified using the multihop command.

D.

The default TTL value of an eBGP message can be modified using the "ttl-security" command.

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Question # 76

What is the result of configuring the following policy statement as a BGP import policy on the Alcatel-Lucent 7750 SR?

A.

All BGP routes are rejected.

B.

All BGP routes are accepted.

C.

All routes matching prefix list "List-1" are rejected.

D.

All BGP routes matching prefix list "List-1" are rejected.

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Question # 77

Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.

Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes" on router R2?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 78

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

A.

"client1" routes will be tagged with communities "North" and "West".

B.

"client1" routes will be tagged with community "West".

C.

"client1" routes will be tagged with community "North".

D.

"client1" routes will be rejected.

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Question # 79

Two Alcatel-Lucent 7750 SRs are established BGP peers with the following add-paths configuration:

R1: configure router bgp add-paths ipv4 send 4 receive

R2: configure router bgp add-paths ipv4 send 2

If router R1 advertises three routes for a given prefix X, how many routes is router R2 expected to have for prefix X?

A.

None

B.

2

C.

3

D.

4

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Question # 80

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP policy?

A.

"client2" routes will be tagged with communities "West" and "North".

B.

"client2" routes will be tagged with communities "West", "North" and "South".

C.

"client2" routes will be tagged with community "West".

D.

"client2" routes will be tagged with community "South".

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Question # 81

Which of the following is NOT a BGP message type?

A.

Route-Refresh

B.

OpenSent

C.

Notification

D.

Update

E.

Keepalive

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Question # 82

What is the default Alcatel-Lucent 7750 SR TTL of a BGP advertisement between confederation members?

A.

1

B.

32

C.

64

D.

255

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Question # 83

What happens to a route that is rejected by an import policy on an Alcatel-Lucent 7750 SR?

A.

The route is discarded.

B.

The route is kept in the RIB-In, but marked as an invalid route.

C.

The route is moved to the LOC-RIB, but not marked as a used route.

D.

The route is moved to the route table, but not to the FIB.

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Question # 84

Which of the following is TRUE if a BGP session state is Connect?

A.

BGP is waiting for the TCP connection to be completed.

B.

BGP has established a TCP connection, and an Open message has been sent to that neighbor.

C.

The BGP session has been interrupted, and a TCP connection is being re-established.

D.

BGP has failed to establish a TCP connection to that neighbor, and ConnectRetry has been reset to zero.

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Question # 85

Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

A.

AS Path of 65200 65100, Next Hop of router A.

B.

AS Path of 65200 65100, Next Hop of router E.

C.

AS Path of 65100, Next Hop of router E.

D.

AS Path of 65100, Next Hop of router A.

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Question # 86

The configuration of an Alcatel-Lucent 7750 SR is given below. Router Rl has established BGP sessions with routers R2 and R3. Which of the following is TRUE?

A.

Router R1forms an iBGP session with router R2, and an eBGP session with router R3.

B.

Router R1forms iBGP sessions with routers R2 and R3.

C.

Router R1forms eBGP sessions with routers R2 and R3.

D.

The types of BGP sessions with routers R2 and R3 cannot be determined.

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Question # 87

Click the exhibit.

Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP 2?

A.

The update is sent to router R2 in ISP 1.

B.

The update is sent to routers R2 and R3 in ISP 1.

C.

The update is sent to all routers in ISP 1.

D.

The update is sent to routers R2 and R3 in ISP 1, and to router R3 in ISP 2.

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Question # 88

Click the exhibit.

Router R6 is a route reflector for clients R1, R2 and R5. Router R5 is configured with a local preference of 200. On which routers is "advertise-external* needed for router R6 to receive exactly two distinct routes for prefix 192.168.1.0/27?

A.

On router R5 only.

B.

On either router R1or R2.

C.

On both routers R1and R2.

D.

On all routers R1, R2 and R5.

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Question # 89

Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

A.

"client2" routes will be only tagged with communities 'East'' and "South".

B.

"client2" routes will be tagged with community "East".

C.

"client2" routes will only be tagged with community "South".

D.

"client2" routes will be rejected.

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Question # 90

Which of the following regarding the withdrawal of routes from one BGP speaker to another is

TRUE?

A.

An update message is used. Only a single prefix can be withdrawn at a time.

B.

An update message is used. Multiple prefixes can be withdrawn at a time.

C.

A withdraw message is used. Only a single prefix can be withdrawn at a time.

D.

A withdraw message is used. Multiple prefixes can be withdrawn at a time.

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Question # 91

What class of attribute is Originator_ID?

A.

Well-known mandatory.

B.

Well-known discretionary.

C.

Optional transitive.

D.

Optional non-transitive.

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Question # 92

A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for 10.0.0.0/8. Both routes have reachable next hops. Which of the following is TRUE?

A.

Only the BGP route is in the route table.

B.

Both routes are in the route table.

C.

None of the routes is in the route table.

D.

Only the OSPF route is in the route table.

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Question # 93

Click the exhibit.

AS 65550 owns the CIDR block 10.64.0.0/12. Router R4 advertises the aggregate 10.64.0.0/12 to AS65540. Which of the following is TRUE regarding the aggregate route advertisement?

A.

The aggregator attribute will not be present, and the atomic aggregate flag will not be set.

B.

The aggregator attribute will not be present, and the atomic aggregate flag will be set.

C.

The aggregator attribute will be present, and the atomic aggregate flag will not be set.

D.

The aggregator attribute will be present, and the atomic aggregate flag will be set.

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Question # 94

What kind of BGP attribute is the Multi_Exit_Disc?

A.

Optional transitive attribute.

B.

Optional non-transitive attribute.

C.

Well-known mandatory attribute.

D.

Well-known discretionary attribute.

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Question # 95

An autonomous system has 7 routers configured with BGP. How many iBGP sessions are required for a fully meshed configuration?

A.

7

B.

13

C.

21

D.

42

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