When I am thinking of IP or MAC address, one simple term comes always to my mind: the national identity number – ID number. This can be contrasted to a programmed address, where the host device issues commands to the NIC to use an arbitrary address”. It may also be known as an Ethernet hardware address (EHA), hardware address or physical address. If assigned by the manufacturer, a MAC address usually encodes the manufacturer’s registered identification number and may be referred to as the burned-in address (BIA). MAC addresses are most often assigned by the manufacturer of a network interface controller (NIC) and are stored in its hardware, such as the card’s read-only memory or some other firmware mechanism. Logically, MAC addresses are used in the media access control protocol sublayer of the OSI reference model. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and WiFi. “A media access control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. For a resource inside the Local Area Network to be accessible over the Internet, a device within the Local Area Network must be connected to the Internet with a public IP address, and the networking must be appropriately configured. On the other hand, a local/private IP address is any number or address assigned to a device on a private TCP/IP Local Area Network that is accessible only within the Local Area Network. Internet standards groups, such as the Network Information Center (NIC) or the Internet Assigned Numbers Authority (IANA), are the organizations responsible for registering IP ranges and assigning them to organizations, such as Internet Service Providers (ISPs). Public or external IP VS local or private IPĪ public/external IP address is any valid address, or number, that can be accessed over the Internet. Its role has been characterized as follows: A name indicates what we seek. An IP address serves two principal functions: host or network interface identification and location addressing. First of all, the definition of IP address according to Wikipedia is the following: “An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. As the title implies, today we will learn how to retrieve the local and the public IP address, as well as the MAC address of a computer using VBA.

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