CCNP Switch: IP Telephony Power over Ethernet (PoE) A Cisco IP Phone is like any other node on the network—it must have power to operate. Power can come from two sources: An external AC adapter Power over Ethernet (DC) over the network data cable The external AC adapter plugs into a normal AC wall outlet and provides 48V DC to the phone. These adapters, commonly … [Read more...]
InterVLAN Routing
InterVLAN Routing Objective: Configure, verify, and troubleshoot interVLAN routing One of the remarkable features about VLAN segmentation with a Layer 2 switch is that the traffic from one VLAN remains separate from all other VLANs. Quite often, however, devices need to communicate or access services with another device that is in another VLAN. Because the VLANs are in … [Read more...]