ACSP Quality of Service (QoS) 2

Question 1

Which QoS mechanism on Aruba switches uses token bucket algorithms to control the rate of traffic egressing a port?

Accepted Answer

Traffic shaping

Answer

Traffic shaping uses token bucket algorithms to buffer and pace traffic, smoothing bursts to conform to a configured rate.

Question 2

On an Aruba switch, which DSCP value is associated with the Expedited Forwarding (EF) per-hop behavior used for voice traffic?

Accepted Answer

DSCP 46

Answer

DSCP 46 (101110 binary) is defined as Expedited Forwarding (EF) and is the standard marking for voice traffic requiring low latency.

Question 3

Which Aruba AOS-CX command applies a QoS schedule profile to an interface?

Accepted Answer

apply qos schedule-profile <name>

Answer

The command 'apply qos schedule-profile <name>' under an interface context attaches a schedule profile to control queue servicing on that port.

Question 4

What is the primary purpose of the 'qos trust' command on an Aruba access port?

Accepted Answer

Instructs the switch to honor incoming DSCP or CoS markings

Answer

'qos trust dscp' or 'qos trust cos' tells the switch to use the packet's existing markings rather than overriding them with a default value.

Question 5

In Aruba's QoS queuing model, which scheduling algorithm gives each queue a guaranteed minimum bandwidth while allowing unused bandwidth to be shared?

Accepted Answer

Weighted Round Robin (WRR)

Answer

WRR assigns weights to queues, guaranteeing minimum bandwidth proportional to each weight while redistributing unused capacity to other queues.

(ACSP) Aruba Certified Switching Professional Practice Test

(ACSP) Aruba Certified Switching Professional Practice Test

ACSP Quality of Service (QoS) 2