In an unmanaged CE router implementation, how does the service provider enforce the SLA?

In a managed CE scenario, the customer’s network is supporting VoIP and bulk file transfers. According to the best practices, which QoS mechanisms should be applied on the WAN edge CE-PE 56-kbps Frame Relay link on the CE outbound direction?

Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of commands shown below, where does the trust boundary lie?

interface fa0/2
mls qos trust cos
mls qos trust device cisco-phone
switchport voice vlan 112

The following commands have been configured under the fa0/1 interface on the 2950 switch:

wrr-queue bandwidth 20 1 80 0
mls qos trust cos
mls qos trust device cisco-phone

Voice traffic from the IP phone that is directly connected to the fa0/1 interface is experiencing excessive delays.

What could be the cause of this problem?

Which QoS mechanism calculates the mean queue depth to determine its operation?

What is the purpose of the qos pre-classify command?

What is the purpose of using multiactions traffic policing?

In which two locations is the qos pre-classify command applied to support QoS preclassification over an IPSec/GRE tunnel? (Choose two.)

Which two commands are typically applied to the voice traffic class within a policy-map? (Choose two.)

Based on the following 2950 switch configurations, which statement is correct?

no wrr-queue cos-map
wrr-queue bandwidth 20 10 70 1
wrr-queue cos-map 4 5
wrr-queue cos-map 1 0 1 2 3
wrr-queue cos-map 3 6 7