In a ring daisy chain, PoE switches are connected in a closed loop (switch A→switch B→switch C→switch D→switch A), which can be more resilient since data can flow in both directions around the loop, providing multiple pathways between connected devices, which enables quick. In a ring daisy chain, PoE switches are connected in a closed loop (switch A→switch B→switch C→switch D→switch A), which can be more resilient since data can flow in both directions around the loop, providing multiple pathways between connected devices, which enables quick. Switching loops occur when network switches are connected together in such a way that network traffic loops around infinitely instead of traversing the hops needed to travel from source to destination. They are a thorn in the side of any network administrator. They can take down an entire network. Say you have vlan 1, 2 and 3 configured on all of them and vlan 5 on switch 1, vlan 6 on switch 2 and vlan 7 on switch 3. If you enable trunking on all switches allowing all vlans with no spanning tree you will have a broadcast storm somewhere. The splitter is the silver and black box in. Power over Ethernet (PoE) is a newer way to provide DC power while also accommodating data through an Ethernet cable. Power is passed from Power Sourcing Equipment (PSE) over the twisted pairs to Powered Devices (PD) such as IP phones, IP cameras, card.