The entire office floor at a company is receiving new multi$-$functional phones at each office. These phones have the capability of sending and receiving regular telephone calls, text messages, and videos so they must function as efficiently as possible. Management also wants to prevent as much clutter as possible so every desk looks tidy. Which of the following should a network administrator implement to accommodate management's requests? $($Select all that apply$)$

A$.$Setup QoS to reserve bandwidth.

B$.$Setup an overlay network.

C$.$Setup PoE to connect to the phones.

D$.$Setup CoS to reserve bandwidth.