Practice Test Geeks(ACSP) Aruba Certified Switching Professional Practice Test
← All ACSP Flashcard Decks

Quality of Service (QoS) Flashcards

7 cards from real ACSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Quality of Service (QoS) flashcards as text

  1. On an Aruba AOS-CX switch, which QoS profile type defines the mapping between DSCP values and local priority queues?

    Answer: DSCP map

    A DSCP map (configured with 'qos dscp-map') defines how incoming DSCP values are translated to local queue priorities on the switch.

  2. Which feature allows an Aruba switch to automatically configure QoS for Cisco IP phones detected via CDP/LLDP on an access port?

    Answer: Auto QoS

    Auto QoS detects IP phones via CDP or LLDP and automatically applies appropriate trust settings and queue configurations for voice traffic.

  3. What happens to packets that exceed the configured police rate when the action is set to 'drop' on an Aruba switch?

    Answer: Packets are discarded immediately

    With a police action of 'drop', packets exceeding the committed rate are immediately discarded rather than buffered or remarked.

  4. In AOS-CX QoS, what does the 'strict' scheduling mode mean when applied to a queue?

    Answer: The queue is always serviced before lower-priority queues, regardless of their content

    Strict priority scheduling always services the strict queue before moving to lower-priority queues, which can starve lower queues if the strict queue is always busy.

  5. Which Layer 2 field is used to carry QoS markings in 802.1Q-tagged Ethernet frames on Aruba switch trunk ports?

    Answer: 802.1p Priority Code Point (PCP)

    The 802.1p PCP field (3 bits within the 802.1Q tag) carries Class of Service (CoS) values 0–7 for Layer 2 QoS on trunk links.

  6. An administrator needs to remark all DSCP values from untrusted endpoints to CS1 (DSCP 8) on ingress. Which Aruba AOS-CX configuration object would accomplish this?

    Answer: A QoS classifier with DSCP remarking action

    A QoS classifier (class map + policy map) can match traffic from untrusted ports and apply a DSCP remark action to set the value to CS1.

  7. Which Aruba QoS concept defines the boundary point where traffic markings are trusted or enforced before entering the network core?

    Answer: Trust boundary

    The trust boundary is the network point (typically the access switch port) where an organization decides to honor or override incoming QoS markings from endpoints.