The IP address of course!
Think about it.
It's on the network layer, It is unique, and it's assigned to every device on the internet!
A Media Access Control (MAC) address is used as a unique identifier for network interface cards (NICs). Each device connected to a network has a unique MAC address assigned by the manufacturer.
Each device can be identified by its IP address (assigned for the network and can be subnetted) and its MAC - which is a device identifier supposedly unique to the device.
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.
This all depends but at a minimum a network map should include the physical network design, the logical network design, and how each device is interconnected to each other with a port number or identifier. EH
OUI (Organizationally Unique Identifier) is used in MAC addresses of network devices to identify the manufacturer or vendor of the device. It helps in organizing and managing network traffic, troubleshooting network issues, and ensuring security by identifying the origins of devices connected to the network.
A network ready device is a device that has the potential to connect to a network, natively it isn't connected to a network, nor is it a network, but with the appropriate configuration and possibly with the addition of components could be connected.
Because they need a device to communicate with a distant network through. These devices are called gateways, and are normally routers. The hosts on a segment need to have knowledge of the gateway device in order to communicate outside the segment. In most environments, the local network will have an internal addressing scheme, one that is not routable on the internet, so there needs to be a device that can translate the internal addresses (non routable on the internet) into external addresses (routable on the internet). Of course this device needs to be connected to both the internal network and the external network to be able to send traffic between them.
A router
MAC address is a unique identifier assigned to most network adapters or network interface cards (NICs) by the manufacturer for identification, and used in the media access control protocol sub-layer. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number. It may also be known as an Ethernet Hardware Address, hardware address, adapter address, or physical address.
Hub is the device used to interconnect nodes in a network
what is the speed of a network adaptor on a Nas DEVICE
One device that is shared on the network is a router. This is the one that will connect the various devices to the shared network.