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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?（）

单选题
2022-01-11 03:25
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.
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正确答案
B
试题解析
标签： CCDP(642-873)
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