User A Calls user. The call gets connected, but the quality is bed. What are two reasons for this issue? (Choose two)

Refer to the exhibit.

A collaboration engineer adds a redundant NTP server to an existing Cisco Collaboration solution On the Cisco UCM OS Administration page the new NTP server shows as "Not Accessible" Which action resolves this issue?

Refer to the exhibit. An administrator configures fax dial-peers on a Cisco IOS gateway and finds that faxes are not working correctly Which change should be made to resolve this issue?

Refer to the exhibit. An engineer verifies the configuration of an MGCP gateway. The commands are already configured. Which command is necessary to enable MGCP?

An engineer implements QoS in the enterprise network. Which command can to verify the correct classification and marking on a cisco IOS switch?