That would be MAC address, which stands for Media Access Control. It is assigned by the manufacturer. The manufactur's are provided with a range to use.
In a standard MAC address, the first 24 bits are assigned by the manufacturer and are known as the Organizationally Unique Identifier (OUI). This unique identifier is used to identify the manufacturer of the network interface card (NIC). The remaining 24 bits are assigned by the manufacturer to uniquely identify the device within their range of addresses.
It is a communication device that goes from client to server.
The Vendor ID (OUI) of the Sources NIC is the unique organizational identifier assigned to the manufacturer of the network interface card by the IEEE. The OUI is the first three bytes of the MAC address assigned to that device.
A network client is any device that requests resources/information from another device.
Client.
The type of router device that sends client request to first available server.
It is a piece of software that is supplied by the device manufacturer.
Resource
The MAC address is unique to each device, assigned by the manufacturer, and cannot be changed. Thus making it an excellent security device. Doing this for 700 pieces of equipment would be quite time consuming.
Shakespeare is well known for the device of mistaken identity.
Integrated Device Manufacturer.