ACA Quality of Service & Traffic Management 2

Question 1

Which DSCP value represents Expedited Forwarding (EF), typically used for VoIP traffic?

Accepted Answer

DSCP 46

Answer

DSCP 0

Answer

DSCP 10

Answer

DSCP 56

Question 2

What is the valid range of 802.1p Class of Service (CoS) values in an 802.1Q tag?

Accepted Answer

0–7

Answer

0–3

Answer

0–15

Answer

0–63

Question 3

Which queuing mechanism guarantees a minimum bandwidth to each class while still allowing unused bandwidth to be shared?

Accepted Answer

Class-Based Weighted Fair Queuing (CBWFQ)

Answer

Strict Priority Queuing

Answer

FIFO

Answer

Tail-drop queuing

Question 4

What does WRED stand for and what problem does it solve?

Accepted Answer

Weighted Random Early Detection — prevents tail-drop congestion by proactively dropping packets before queues fill

Answer

Wireless Routing Efficiency Design — optimizes wireless routing paths

Answer

Wide-Range Error Detection — identifies transmission errors on WAN links

Answer

Weighted Round-Robin External Delivery — balances load across WAN circuits

Question 5

In Aruba AOS-CX switches, what is the default number of QoS queues available per port?

Accepted Answer

8

Answer

2

Answer

4

Answer

16

Question 6

What DSCP value is assigned to Best Effort (BE) traffic, which receives no special QoS treatment?

Accepted Answer

DSCP 0

Answer

DSCP 8

Answer

DSCP 16

Answer

DSCP 32

Question 7

Which Aruba feature allows network administrators to apply QoS policies based on identified application type rather than just IP/port?

Accepted Answer

Application Visibility and Control (AVC) with AppRF

Answer

OSPF route redistribution

Answer

Aruba Central NetConductor

Answer

Spanning Tree Protocol (STP)