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Exam : Alcatel-Lucent 4A0-107
Title : Alcatel-Lucent Quality of Service

1. Which of the following statement is true with regards to Q-in-Q on the Alcatel-Lucent 7750 SR?
A. Q-in-Q defines a mechanism for encapsulating queued DSCP traffic at the provider edge
B. Q-in-Q is a new protocol that supercedes 802.1p priority-bit mapping in a QoS-aware network
C. The use of either the inner or outer 802.1p bits in the 802.1q frames for QoS classification can be configured on the Alcatel-Lucent 7750 SR
D. Q-in-Q is a protocol which re-encapsulates trunked p-bits in an outer label that is mapped into the EXP bits in an MPLS backbone
E. none of the above
Answer: C

2. Which of the following statements are true regarding the DSCP bits? Choose 3 answers.
A. The precedence level bits define 4 Assured Forwarding Classes
B. The three least significant bits of the DSCP bits specify the drop probability
C. The 8 bits of the TOS field are used for DSCP
D. To convert DSCP to IP Precedence the three most significant bits are matched
E. DSCP provides for 64 precedence levels with 3 drop probabilities
Answer: ABD

3. True of False: A proper end-to-end QoS solution is becoming more of an issue even as more bandwidth is being made available to today’s bandwidth-intensive, interactive multimedia applications.
A. True
B. False
Answer: A

4. Which of the following are not considered a differentiator/classifier of customer traffic at layer 2 or 3 of the OSI model? Choose all that apply.
A. DSCP
B. 802.1p
C. IP Precedence
D. TCP/UDP Port numbers
E. HTML version
Answer: DE

5. Which of the following are Ethernet SAP encapsulation types? Choose all that apply.
A. Null
B. Dot1Q
C. Q-in-Q
D. IPCP
E. BCP-Null
F. BCPdot1.q
G. Frame Relay
Answer: ABC

6. Which of the following are examples of metrics for QoS?
A. delay, jitter, packet loss
B. latency, FIFO, WRED
C. signal degradation, attenuation, line loss
D. SNR, radial CODEC inversion, latency
E. Inverse Queue Depletion, delay, packet loss
Answer: A

7. The IOM is responsible for which of the tasks listed below? Choose 3 answers.
A. local processing of critical control plane functions
B. IPSec VPN hardware accelerated encryption
C. queuing, scheduling, and buffer management
D. IP/MPLS/MAC forwarding lookup
E. Layer 2 / Layer 3 encapsulation
Answer: CDE

8. Pick from the following list the 3 major components of the QoS features on the Alcatel-Lucent 7750 SR.
A. virtual inflow classification
B. real-time QoS shaping
C. traffic classification
D. 802.1q p-bit rate-limiting
E. buffer memory management
F. traffic scheduling
Answer: CEF

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