What is one of the reasons that custom QoS ACLs are recommended over automatic QoS when configuring ports on a Catalyst 6500 for use with IP phones?
A) 79xx IP phones do not automatically mark voice packets with non-zero DSCP values.
B) 79xx IP phones do not mark protocol packets such as DHCP, DNS, or TFTP with non-zero DSCP values.
C) 79xx IP phones do not mark voice packets with optimal DSCP values.
D) 79xx IP phones use a custom protocol to communicate CDP information to the switch.

Question

Quizplus · Accepted Answer

79xx IP phones do not mark protocol packets such as DHCP, DNS, or TFTP with non-zero DSCP values, which can affect the quality of service for these packets. Custom QoS ACLs allow for better control and prioritization of these packets.

What Is One of the Reasons That Custom QoS ACLs