A technician is installing six PCs and six VoIP telephones on a small office LAN. The VoIP telephones require QoS to be configured for proper operation. The customer router does not have QoS capability.
Which of the following network devices should the technician purchase and install at this office?
A . Managed PoE switch
B . Load balancer
C . Layer 3 switch
D . Unmanaged PoE switch
Answer: A