Network Configuration

A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network.
Managed switches give you more control over your LAN traffic and offer advanced features to control that traffic. An unmanaged switch simply allows Ethernet devices to communicate with one another, such as a PC or network printer, and those are typically what we call “plug and play.”
The main difference between the 802.3af (PoE) and 802.3at (PoE+) standards is the maximum amount of power they provide over the Cat5 cabling. The maximum amount of power for the 802.3af (PoE) standard is 15.4 watts. The maximum for the 802.3at (PoE+) standard is 25.5 watts.
When the device is a switch, it is commonly called an end span (although IEEE 802.3af refers to it as endpoint). Otherwise, if it's an intermediary device between a non-poE capable switch and a PoE device, it's called a mid-span. An external Poe injector is a mid-span device./receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network.