A company has recently deployed VoIP phones in its office and intends to power these devices using the network infrastructure. The VoIP phones support Power over Ethernet (PoE). Considering a cost-effective solution, which network switch feature should the company implement to provide power to these phones?
Hub with integrated power outlets
Unmanaged switch with external PoE injectors
Layer 3 capable switch without PoE
PoE-capable switch
Standard switch with UPS backup for power failure resilience