A Mac Address is the physical or virtual address of your NIC card or network interface. From a computer on a network\'s standpoint, it is the physical address of that computer\'s NIC card. It is used to bring information to that computer on Layer 2 of the OSI model. The IP address is required on layer 3. You require it to communicate with computers on different subnets and devices.The IP Address verifies \"where\" the device is located within a network. The IP addresses and Mac Addresses are used in tandem. Address Resolution Protocol is used to link the two together by resolving IP Addresses to Mac Addresses within the Link Layer within a single network. MAC addresses and IP addresses operate on different layers of the internet protocol suite. MAC addresses are used to identify machines within the same broadcast network on layer 2, while IP addresses are used on layer 3 to identify machines throughout different networks. Even if your computer has an IP address, it still needs a MAC address to find other machines on the same network (especially the router/gateway to the rest of the network/internet), since every layer is using underlying layers. Solution A Mac Address is the physical or virtual address of your NIC card or network interface. From a computer on a network\'s standpoint, it is the physical address of that computer\'s NIC card. It is used to bring information to that computer on Layer 2 of the OSI model. The IP address is required on layer 3. You require it to communicate with computers on different subnets and devices.The IP Address verifies \"where\" the device is located within a network. The IP addresses and Mac Addresses are used in tandem. Address Resolution Protocol is used to link the two together by resolving IP Addresses to Mac Addresses within the Link Layer within a single network. MAC addresses and IP addresses operate on different layers of the internet protocol suite. MAC addresses are used to identify machines within the same broadcast network on layer 2, while IP addresses are used on layer 3 to identify machines throughout different networks. Even if your computer has an IP address, it still needs a MAC address to find other machines on the same network (especially the router/gateway to the rest of the network/internet), since every layer is using underlying layers..