多选题For Ethernet-to-Ethernet routers, such as the Cisco 831 behind a cable modem or DSL bridge, a traffic shaper is configured. This is required since the output 10-Mbps interface will not be congested. Which two statements are true?（）AThe parent policy-map shapes and the child policy-map queues.BThe mean-rate and burst-size must always be the same value.CThis will not work without a Dialer interface configured.DThe shaper provides congestion feedback.
多选题
For Ethernet-to-Ethernet routers, such as the Cisco 831 behind a cable modem or DSL bridge, a traffic shaper is configured. This is required since the output 10-Mbps interface will not be congested. Which two statements are true?（）
A
The parent policy-map shapes and the child policy-map queues.
B
The mean-rate and burst-size must always be the same value.
C
This will not work without a Dialer interface configured.
D
The shaper provides congestion feedback.
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