Which of the following are major components of QoS functionality on the Alcatel-Lucent 7750 SR? (Choose three)

Question

Options

• AMicroflow reservations using RSVP
• BDSCP to EXP translation
• CTraffic classification
• DAutomatic profiling and policy configuration
• EBuffer memory management
• FTraffic scheduling

• B
  7% (1)
• C
  93% (14)

Explanation

QoS on the Alcatel-Lucent 7750 SR is built around three core functions: traffic classification (C) identifies and marks traffic so the router knows how to treat it; buffer memory management (E) controls how packets are queued and dropped under congestion; and traffic scheduling (F) determines the order and rate at which queued packets are forwarded. Together, these three cover the full lifecycle of a packet moving through the QoS pipeline - classify it, hold it, then send it.

Why the distractors are wrong:

• A (RSVP microflow reservations): RSVP is a signaling protocol for reserving bandwidth, not a QoS functional component built into the 7750's forwarding plane architecture.
• B (DSCP to EXP translation): While the 7750 can remark headers, DSCP-to-EXP mapping is a specific remarking feature, not a major component of the QoS framework itself.
• D (Automatic profiling and policy configuration): The 7750 requires explicit, manually configured QoS policies - there is no automatic profiling engine that builds policies on your behalf.

Memory tip: Think of QoS as a three-stage pipeline - "Classify → Store → Send" - mapping directly to C, E, F. If an answer choice describes something outside this pipeline (like signaling protocols or auto-configuration), it's almost certainly a distractor.

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