Which of the following is false regarding an SDP?

It is specific to a single service.

It provides transport tunnel encapsulation.

It is specific to a single service.

LDP can be used as the signaling protocol.

Which of the following accurately describes a P device?

It is responsible for adding and removing labels.

It is used exclusively by the customer.

It is responsible for adding and removing labels.

It swaps label information and forwards packets.

It creates an LSP in the provider network.

Which of the following is not an accurate description of a VPN?

Any network that includes encryption

A series of point-to-point tunnels configured on client equipment

A tunnel technology created in a provider network

A function of MPLS networks to create private communities of users

Any network that includes encryption

Which of the following is false regarding LDP?

It is the only method for distributing labels in an MPLS network.

It is used to define unidirectional paths through the network.

It is a protocol specifically intended for label distribution.

It is the only method for distributing labels in an MPLS network.

It describes a path through the MPLS network based on the IGP path.

Which of the following term-definition pairs is incorrect?

Label distribution protocol-Series of labels and next-hop interfaces

In an MPLS network, the customer routers have no knowledge of how the MPLS features are implemented. The benefits of this include _____.

It allows for very scalable VPN solutions.

It lowers CE management overhead.

The relationship between LDP and an IGP is best described as _____.

LDP uses IGP next-hop information.

LDP paths are preferred over IGP routes.

LDP uses IGP next-hop information.

LDP re-distributes labels into IGP.

IGP tags network destinations with LDP information.

Alcatel-lucent Scalable IP Networks Mpls

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| Written by Teenoko

Teenoko

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Quizzes Created: 2 | Total Attempts: 331

Questions: 15 | Attempts: 147 | Updated: Mar 21, 2023

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Preparing for the Network Routing Specialist I (NRS I) Certification Exam (4A0-100)

Questions and Answers

1.

Which of the following is false regarding an SDP?
- A.
  
  It provides transport tunnel encapsulation.
- B.
  
  It is specific to a single service.
- C.
  
  The SDP ID is locally unique.
- D.
  
  LDP can be used as the signaling protocol.
Correct Answer
B. It is specific to a single service.

Explanation
SDPs are not specific to a single service and can support multiple services.

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2.

Which of the following accurately describes a P device?
- A.
  
  It is used exclusively by the customer.
- B.
  
  It is responsible for adding and removing labels.
- C.
  
  It swaps label information and forwards packets.
- D.
  
  It creates an LSP in the provider network.
Correct Answer
B. It is responsible for adding and removing labels.

Explanation
Answer A is a CE, and answer C is a P. D is partially correct, but B is the more accurate answer.

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3.

Which of the following is not an accurate description of a VPN?
- A.
  
  A series of point-to-point tunnels configured on client equipment
- B.
  
  A tunnel technology created in a provider network
- C.
  
  A function of MPLS networks to create private communities of users
- D.
  
  Any network that includes encryption
Correct Answer
D. Any network that includes encryption

Explanation
Encryption can be a part of a VPN, but the correct description of a VPN should include a way to privatize communications between user communities. The other answers speak to this, but answer D does not.

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4.

Which of the following is false regarding LDP?
- A.
  
  It is used to define unidirectional paths through the network.
- B.
  
  It is a protocol specifically intended for label distribution.
- C.
  
  It is the only method for distributing labels in an MPLS network.
- D.
  
  It describes a path through the MPLS network based on the IGP path.
Correct Answer
C. It is the only method for distributing labels in an MPLS network.

Explanation
LDP is only one method of distributing labels; RSVP can be used as well as other protocols.

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5.

Which of the following term-definition pairs is incorrect?
- A.
  
  Push-Add a label
- B.
  
  Swap-Replace a label
- C.
  
  Label distribution protocol-Series of labels and next-hop interfaces
- D.
  
  Pop-Remove a label
Correct Answer
C. Label distribution protocol-Series of labels and next-hop interfaces

Explanation
This description is the Label Switched Path.

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6.

The most commonly used label distribution protocol is _____.
- A.
  
  OSPF
- B.
  
  BGP
- C.
  
  LDP
- D.
  
  Option 4
Correct Answer
C. LDP

Explanation
LDP is the most common label distribution protocol.

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7.

Which of the following is not a type of VPN?
- A.
  
  VPWS
- B.
  
  VPNM
- C.
  
  VPLS
- D.
  
  VPRN
Correct Answer
B. VPNM

Explanation
VPNM is not a type of VPN.

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8.

A VPN that provides a simple point-to-point service between two destinations is a _____.
- A.
  
  VPNM
- B.
  
  VPLS
- C.
  
  VPWS
- D.
  
  None of the above
Correct Answer
C. VPWS

Explanation
VPWS is a VPN that emulates a point-to-point service between two destinations.

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9.

The VPN service that must maintain a table of MAC addresses is _____.
- A.
  
  VPWS
- B.
  
  VPLS
- C.
  
  VPRN
- D.
  
  Both A and B
Correct Answer
B. VPLS

Explanation
VPLS is a VPN that must maintain a table of MAC addresses.

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10.

The VPN service that requires encryption is _____.
- A.
  
  VPRN
- B.
  
  VPNM
- C.
  
  VPLS
- D.
  
  None of the above
Correct Answer
D. None of the above

Explanation
None of the VPN services provided by an MPLS network require encryption.

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11.

The VPN service that appears to the customer as a private routed network is _____.
- A.
  
  VPNM
- B.
  
  VPRN
- C.
  
  VPLS
- D.
  
  VPWS
Correct Answer
B. VPRN

Explanation
VPRN is a VPN that appears to a customer as a private routed network.

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12.

As a packet traverses an MPLS network, it passes through a router that removes one label and replaces it with another. The router it passed through was a _____ router.
- A.
  
  PE
- B.
  
  CE
- C.
  
  LER
- D.
  
  P
Correct Answer
D. P

Explanation
P routers swap labels and forward them to other P or PE routers.

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13.

A packet arrives at a router with a label, and the router cannot perform any operations on it. The router is most likely a _____.
- A.
  
  LSR
- B.
  
  PE
- C.
  
  LER
- D.
  
  None of the above
Correct Answer
D. None of the above

Explanation
PE, LSR, and LER routers can all understand labels. The router is most likely a CE router, which is not one of the choices.

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14.

In an MPLS network, the customer routers have no knowledge of how the MPLS features are implemented. The benefits of this include _____.
- A.
  
  Ease of CE configuration
- B.
  
  It allows for very scalable VPN solutions.
- C.
  
  It lowers CE management overhead.
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
Transparency of the MPLS features to a CE device has all of the benefits listed.

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15.

The relationship between LDP and an IGP is best described as _____.
- A.
  
  LDP paths are preferred over IGP routes.
- B.
  
  LDP uses IGP next-hop information.
- C.
  
  LDP re-distributes labels into IGP.
- D.
  
  IGP tags network destinations with LDP information.
Correct Answer
B. LDP uses IGP next-hop information.

Explanation
LDP and IGPs do not re-distribute information directly or compete with each other for paths as they perform completely different functions, although LDP does use the information from IGP to populate the next-hop interfaces for labels.

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Alcatel-lucent Scalable IP Networks Mpls

Which of the following is false regarding an SDP?

Which of the following accurately describes a P device?

Which of the following is not an accurate description of a VPN?

Which of the following is false regarding LDP?

Which of the following term-definition pairs is incorrect?

The most commonly used label distribution protocol is _____.

Which of the following is not a type of VPN?

A VPN that provides a simple point-to-point service between two destinations is a _____.

The VPN service that must maintain a table of MAC addresses is _____.

The VPN service that requires encryption is _____.

The VPN service that appears to the customer as a private routed network is _____.

As a packet traverses an MPLS network, it passes through a router that removes one label and replaces it with another. The router it passed through was a _____ router.

A packet arrives at a router with a label, and the router cannot perform any operations on it. The router is most likely a _____.

In an MPLS network, the customer routers have no knowledge of how the MPLS features are implemented. The benefits of this include _____.

The relationship between LDP and an IGP is best described as _____.