What is the default queuing mechanism on slow serial interfaces?

Which QoS mechanism will prevent a decrease in TCP performance?

Which of the following is true about WRED?

Refer to the Exhibit.

The show command was taken on a router, while a large file was uploading to a server, and a
VOIP call was running at the same time:
During the file upload, the remote user on the call complains about poor call quality. After the
upload is complete, everything operates properly, and the remote user can hear the local user
perfectly.
Which QoS mechanism will solve the issue with the VOIP quality?

Which QoS mechanism will allow traffic flows an equal share of the bandwidth?

If shaping is configured with 128 KB/s and a committed burst of 3200 B/s, what would be the value
of TC?

Which three statements are true about policing? (Choose three.)

Refer to the exhibit. As a network administrator, you have configured a dual-rate, dual-bucket
policer in accordance with RFC 2698 on the serial interface of you router, connecting to your
provider. The SLA with your provider states that you should only send AF31 (limited to 150 kb/s),
AF32 (limited to 50 kb/s)and AF33 (best effort). Your service provider claims you are not
conforming to the SLA. Which two things are wrong with this configuration? (Choose two.)

Refer to the exhibit. You have noticed that several users in the network are consuming a great
deal of bandwidth for the peer-to-peer application Kazaa2. You would like to limit this traffic, and at
the same time provide a guaranteed 100 kb/s bandwidth for one of your servers. After applying the
configuration in the exhibit, you notice no change in the bandwidth utilization on the serial link; it is
still heavily oversubscribing the interface. What is the cause of this problem?

All of these are fundamental building blocks of differentiated services Traffic Conditioner Block
except which one?