An example scenario: A network with two devices is considered. Both parents are at home with their laptops in the same network. The devices have the following attributes: The two devices, in this case hosts, are connected to each other via Ethernet in a "Local Area Network" or LAN for short. Let's assume Host A (the father) wants to send a picture from his last summer vacation to Host B (the mother). The source IP address of the father is 192.168.42.1, the destination address of the mother is 192.168.42.2. Since Ethernet is used, the IP packet must be packed into an Ethernet frame. The link layer of host A needs the MAC address of host B for this. However, the MAC address of Host B is not known to Host A at this time. When Host A uses the ARP protocol, it first sends an ARP request to all participants in the network, i.e. to all devices within the family. This ARP request contains both the IP and MAC addresses of the father and the destination/IP address of the mother. Each device within the network receives the request and stores the data of the father, thus creating an entry in its own ARP table. This request to all laptops within the network allows the devices in the household to "get to know" each other. This makes it easier for the devices to communicate with other devices in the household later on. In this case, only the mother's device feels addressed because it has the respective destination address, or IP address. The laptop of host B (the mother) now knows both the IP and the MAC address of host A (the father) and sends back its own MAC address in response. This allows the father's device to uniquely identify the mother's laptop and send her the picture from her last summer vacation.