This is like how John Smith's home has an address assigned to it by the postal service. Your router/modem has a unique IP address assigned by your ISP. So, let's break down our postal example into technical terms. Comparing IP and MAC Addresses to a Postal Service The MAC address is like your friend John Smith's name: it's who (or what) the target is. You'll need your good friend John's name too, so you don't confuse the whole Smith family on who the package is for when it arrives.Īs such, the home address acts as the IP address it's where the target is. In Windows, Linux and other operating systems, the command line. That's why you need his home address.īut the home address itself isn't enough on its own, either. Most computers allow you to see the list of IP and MAC addresses that ARP has collected there. While this would be enough to get your package to John, you can't just tell the post office to send it to "John Smith, son of Edward, son of George, son of." Even though it uniquely identifies him, it'd be a pain for the post office to find him. However, what if we incorporated his ancestry (i.e., his "manufacturer") into his name? If we did that, he'd be called "John Smith, son of Edward, son of George, son of." Go far back enough, and it becomes unique.
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