Question 1.
Which factor is a primary cause of IP hyper-aggregation?

A. IP routing protocols do not always select the best route to a destination
B. IP routing protocols always select multiple routes to a destination
C. IP routing protocols do not make use all availablenetwork attributes to select a path
D. Improper network design results in limited network path redundancy

Answer: C

Question 2.
Inspecting the MPLS header in the received packet and exchanging it for a new MPLS header is the function of which device?

A. iLER
B. LER
C. LSR
D. PE
E. eLER

Answer: C

Question 3.
Choose the answer that best completes the following statement. The device at the beginning of an LSP is referred to as the ____ while the device at the end of an LSP is referred to as the ____.

A. PE, P
B. LER, LSR
C. LSR, LER
D. iLER, eLER
E. eLER, iLER
F. P, PE

Answer: D

Question 4.
Which of the following statements are true regarding the roles of devices in an MPLS domain?
Choose 2 answers.

A. An LER is located internal to the provider domain and switches labeled packets
B. An LSR is located internal to the provider domain and switches labeled packets
C. An LSR is located at the boundary of the provider domain and may forward labeled or 
    unlabeled packets
D. An LER is located at the boundary of the provider domain and may forward labeled or 
    unlabeled packets

Answer: B, D

Question 5.
Receiving labeled packets from the MPLS domain, removing the MPLS header and forwarding unlabeled packets outside the MPLS domain is the function of which device?

A. LER
B. LSR
C. PE
D. iLER
E. eLER

Answer: E

Question 6.
What are the functions of the control plane in a MPLS router? Choose 2 answers.

A. Route exchange
B. Label swapping
C. MPLS neighbor establishment
D. Label signaling
E. Routing lookups

Answer: A, D

Question 7.
Which of the following factors are driving the evolution of the MPLS protocol and services? Choose 2 answers.

A. Customers demand for differentiated IP services
B. MPLS usage has been mandated by the IETF
C. Providers want to improve service availability and reliability
D. It is an easier technology to configure and manage than IP alone

Answer: A, C

Question 8.
Which of the following statements are true? Choose all that apply.

A. Selected labels from the FIB are populated to the LIB
B. Selected labels from the LIB are populated to the LFIB
C. Selected routes from the RIB are populated to the FIB
D. Selected routes from the FIB are populated to the RIB
E. All labels from the LIB are populated to the LFIB

Answer: B, C

Question 9.
What is the function of the MPLS label assigned to a packet?

A. It identifies the FEC
B. It specifies the packets header length
C. It identifies the origin of the packet
D. It specifies the type of data contained in the packet

Answer: A

Question 10.
What is the common usage of the MPLS EXP bits?

A. Each implementation may use them as they see fit
B. They are used to carry theEthertype value
C. They are used to carry the TTL value
D. They are used to mapQoS classification
E. They are used to carry fragmentation flags

Answer: D

Question 11.
If an Alcatel-Lucent 7750 SR receives an unlabeled packet with an IP TTL of 1, which of the following statements is true?

A. The packet will be labeled and forwarded with an MPLS TTL of 1
B. The packet will be labeled and forwarded with an MPLS TTL of 255
C. The packet will be dropped by the device
D. An error will occur when the device attempts to label the packet and assign the MPLS TTL of 0

Answer: C

Question 12.
Which of the following statements is true regarding per-platform label space? Choose 2 answers.

A. A separate label is used for each interface that the FEC is advertised on
B. Uses fewer label resources than a per-interface label space
C. Is typically used when the device has ATM or Frame Relay interfaces
D. Uses more label resources than a per-interface label space
E. A single label may be assigned to a FEC and used across all interfaces of the same router
F. Only valid when the LDP peers are directly connected over an interface, and the label is only 
    going to be used for traffic sent over that interface

Answer: B, E

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