Immediately After a Small Company Implemented VoIP Telephony, Users Began

Multiple Choice

Immediately after a small company implemented VoIP telephony, users began reporting dropped calls. Large files and videos are being transferred on the same network as the VoIP phones. Which of the following should the network administrator do to prevent dropped calls? (Choose two.)

A) Implement QoS.
B) Increase MTU.
C) Implement download quotas.
D) Update phone firmware.
E) Move VoIP phone sets to different VLAN.
F) Configure a separate DNS server for the VoIP phones.