![]() Continuing our example of the IP address 192.168.1.34, the host ID would be 34-the host’s unique ID on the 192.168.1.0 network. It identifies a specific device (in the TCP/IP world, we call devices “hosts”) on that network. Host ID: The host ID is the part of the IP address not taken up by the network ID.It’s custom to fill in the missing final part with a zero, so we might say that the network ID of the device is 192.168.1.0. On a typical home network, where a device has the IP address 192.168.1.34, the 192.168.1 part of the address will be the network ID. Network ID: The network ID is a part of the IP address starting from the left that identifies the specific network on which the device is located.That IP address we mentioned before (192.168.1.34) in binary would look like this: 11000000.10101000.00000001.00100010.Ī device’s IP address actually consists of two separate parts: In an octet, the number zero would be 00000000, while the number 255 would be 11111111, the maximum number the octet can reach. The reason each number can only reach up to 255 is that each of the numbers is really an eight digit binary number (sometimes called an octet). ![]() You’ve seen these addresses before they look something like 192.168.1.34.Īn IP address is always a set of four numbers like that. What Is an IP Address?Īn IP address uniquely identifies a device on a network. We’re not going to be covering some of the more advanced, or professional, level stuff, like IP classes, classless routing, and custom subnetting…but we will point to some sources for further reading as we go along. Note: We’re going to be covering the basics of IP addressing in this article, the kind of stuff that people who use IP addresses, but never really thought much about them, might want to know. And, if you ever need to set up something a little more advanced-like hosting a game server or media server to which friends from the internet can connect-you’ll need to know something about IP addressing. Why should you care? Well, understanding how IP addresses work is vital if you ever want to troubleshoot why your network isn’t working right, or why a particular device isn’t connecting the way you’d expect it to. RELATED: 8 Common Network Utilities Explained But, if you’ve ever wanted to dive a little deeper into what those numbers mean, this article is for you. When we do have to deal with them, we often just follow instructions about what numbers to put where. Most of the time, we don’t have to deal with them directly, since our devices and networks take care of that stuff behind the scenes. If you’ve worked with computers for any amount of time, you’ve likely been exposed to IP addresses-those numerical sequences that look something like 192.168.0.15. In the world of TCP/IP networking, that identifier is the Internet Protocol (IP) address. Every device connected to a network-computer, tablet, camera, whatever-needs a unique identifier so that other devices know how to reach it.
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