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4A0-105 Practice Exam Questions and Answers

Nokia Virtual Private LAN Services

Last Update 5 days ago
Total Questions : 156

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Question # 1

Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)

Options:

A.  

The loopback control PDU instructs the remote port to enter loopback mode.

B.  

Putting a port in loopback does not affect customer data flow

C.  

Both ports must rediscover the OAM capabilities of each other once the port is put back into service.

D.  

Both ports must still send Information PDUs to avoid going back to discovery mode.

E.  

When a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.

F.  

All packets, except for information PDUs, are looped back.

Discussion 0
Question # 2

Which of the following statements about a management VPLS are true? (Choose 2)

Options:

A.  

A management VPLS carries customer traffic over the non-blocking spoke-SDP

B.  

A VPLS service must be defined as a management VPLS upon creation to take on the role of a management VPLS

C.  

The state of a spoke-SDP within a user VPLS will take on the state of the spoke-sdp within the management VPLS.

D.  

The management VPLS must be created before the user VPLS.

Discussion 0
Question # 3

In IEEE 802.1ag, how are loops detected?

Options:

A.  

Spanning-tree BPDUs are returned to the sender.

B.  

The MEP sees its own CFM frames returned to itself.

C.  

This is not a function of IEEE 802.lag but of 802.1D

D.  

The record field of the CFM frame keeps track of chassis-mac addresses.

Discussion 0
Question # 4

The service-mtu of a VPLS using MPLS encapsulation is set to 9100. What is the minimum MTU value that can be set for the network port if fast re-route facility mode is used on the SDP LSP?

Options:

A.  

9100

B.  

9104

C.  

9108

D.  

9122

E.  

9126

Discussion 0
Question # 5

What function in IEEE 802.1 ah helps to limit the amount of MAC addresses learned in the core?

Options:

A.  

I-VPLS is configured in the core of the network with an l-MAC address. This l-MAC address is the only MAC learned in the core

B.  

The B-VPLS and l-VPLS are configured in the edge. The B-VPLS is configured with a Backbone MAC and is the only MAC learned in the core

C.  

Each SDP is configured with a Backbone MAC to hide customer MAC addresses in the core

D.  

Each SAP is associated with a common l-MAC to hide customer MAC addresses in the core

Discussion 0
Question # 6

What is PBB also known as?

Options:

A.  

H-VPLS

B.  

IEEE 802.lag

C.  

MAC aggregation

D.  

MAC-in-MAC

Discussion 0
Question # 7

Click on the exhibit below.

Question # 7

Which port will become the alternate port?

Options:

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

Discussion 0
Question # 8

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

Options:

A.  

The frame will be flooded.

B.  

The frame will be discarded.

C.  

The frame will be fragmented.

Discussion 0
Question # 9

You are providing a customer two VPLS services in two different Metro networks. VPLS 500 has been configured in Metro 1 and VPLS 900 has been configured in Metro 2. The customer has requested that they have connectivity between the Metro Networks with their existing VPLS services. Which configuration on the PE routers linking the metro networks will allow for VPLS 500 and VPLS 900 to act as a single VPLS service? Assume default values for all VPLS parameters and SDP 999 exists between the metro networks.

Question # 9

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Question # 10

Click on the exhibit below.

Question # 10

Which ports will become root ports? (Choose 3)

Options:

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

Discussion 0
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