Depending on the platform you’re using, this address might be called something different. In addition to the IP address itself and the associated subnet mask, you’ll also see a default gateway address listed along with IP addressing information. RELATED: Understanding Routers, Switches, and Network Hardware That’s a little beyond the scope of this article, but if you’re interested, Cisco has a pretty good guide on subnetting. People often use custom subnet masks (where the position of the break between zeros and ones shifts within an octet) to create multiple subnets on the same network. Things get more complicated than this on bigger networks. Note: The basic subnet masks we’re describing here are known as default subnet masks. The 255s “mask out” the network ID from the equation.
The position of the changes from 255 to 0 indicate the division between the network and host ID. On most simple networks (like the ones in homes or small businesses), you’ll see subnet masks like 255.255.255.0, where all four numbers are either 255 or 0. So, how does your device determine which part of the IP address is the network ID and which part the host ID? For that, they use a second number that you’ll always see in association with an IP address. On a particular street, every house number is unique, just like all host iDs within a particular network ID are unique. Within a city, no two streets will be named the same, just like no two network IDs on the same network will be named the same. The street name is like the network ID, and the house number is like the host ID. Take an address like 2013 Paradise Street. It’s pretty similar to how street addresses work within a city. To picture all this a little better, let’s turn to an analogy. All of these are unique devices (with host IDs 1, 2, 30, and 34 in this case) on the same network (with the network ID 192.168.1.0). 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.
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.You’ve seen these addresses before they look something like 192.168.1.34.Ī device’s IP address actually consists of two separate parts: 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.
#How to check docker ip range how to#
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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