Which of the following statements regarding the egress port scheduler is TRUE?

Question

Options

• AThe egress port scheduler can have up to 17 children spread across 8 levels.
• BMultiple egress port schedulers can be assigned to a single port with many HQoS children.
• CMultiple HQoS policies can be children of a single port scheduler.
• DMultiple egress port schedulers can be children of a single HQoS scheduler.

• A
  4% (2)
• B
  2% (1)
• C
  92% (47)
• D
  2% (1)

Explanation

Option C is correct because in an HQoS hierarchy, the egress port scheduler functions as the root/top-level node, and multiple HQoS policies (schedulers) can be attached beneath it as children - this is the defining characteristic of hierarchical QoS architecture.

Why the distractors are wrong:

• A is wrong because the specific figures (17 children, 8 levels) don't accurately describe the egress port scheduler's constraints - these numbers are fabricated distractors.
• B reverses a key rule: only one egress port scheduler can be assigned to a single physical port; you cannot stack multiple port schedulers onto the same port.
• D inverts the hierarchy entirely - the port scheduler is the parent, not the child. HQoS schedulers sit beneath it, so a port scheduler cannot be a child of an HQoS scheduler.

Memory tip: Think of the port scheduler as a flagpole - there's exactly one per port (not multiple), and HQoS policies hang off it like multiple flags. The flagpole is always on top, never hanging off something else.

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