So, the three decisions mentioned above and detailed below are best done early in the game. This way, if the change screws things up, the router can be reset without losing any other configuration changes you may have made.
This range also determines the maximum number of devices that can connect to the router. For most people, most of the time, a range that allows for connected devices give or take should be sufficient. Pretty much every home router uses a subnet that supports a maximum of connected devices. A subnet that allows for devices is specified with the first three numbers of the four numbers in an IP Address with an X serving as a wildcard.
For example, very popular subnets are Because they are popular, they are best avoided. Using a subnet such as That is, you can, and should, use them in your home or office. IP addresses that start with So too are all the IP addresses that start with You will never find any IP address on the public Internet that starts with either a 10 or with Meanwhile, every home in the world can use the Whether you opt for a subnet that starts with If you prefer In September , malware was found looking for routers on the If you prefer IP addresses starting with 10, then the subnets to avoid are Some easy to remember networks would be That said, easy to remember should not be a priority, security should be.
So, something that no one would guess, like If you live at Main Street, then To really live off the beaten path, you can chose a subnet between These too, are reserved for LAN-side use only and, I suspect, used much less often than For example, I have never seen or heard of a router that uses one of these subnets by default. My guess is that they are un-popular because they are harder to remember.
Then too, their subnet masks next topic are non-standard and there may be some routers that do not support it. Hand in hand with picking a subnet, is the concept of a subnet mask. The mask is what defines your subnet to the router. The bad news is that subnet masks are bit binary digit masks and thus confusing for non-techies.
The good news is that almost every home network uses the same subnet mask, so chances are that you can skip the details. A subnet of It also means that the network can not contain more than devices. The highest and lowest IP addresses often have special meanings, so I would limit this subnet to Thus, a max of concurrent devices, which is enough for almost everyone.
The subnet mask for any network where the first three numbers are the same is The means that that part of the IP address is part of the subnet, the 0 means that it is not. So, Thus, A subnet mask of For this reason, you often see it referred to as The guest network should have its own network address it the separation is done by a router.
Using a mask of Yes you host can be Your email address will not be published. Skip to content Setting up a device on a home network sometimes requires that you manually enter an IP address.
Before we look at subnet masks you first need to understand IP addresses. So it is of this form: a. A typical IP address appears like this: The purpose of the subnet mask is to split the IP address into the two components. If we do some more examples:! P address On a home network the mask Leave a Reply Cancel reply Your email address will not be published. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits.
Is my infrastructure typical? No, but it's not that unusual either. Improve this answer. John John 1, 13 13 silver badges 12 12 bronze badges.
The question is also good. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. This is exactly why you need to port forward routers to open devices to the Internet.
The Internet is a special case in that the number of addresses are limited and you must use this public-private address arrangement. The private addresses are actually reserved from public use; the following addresses are used only for private devices:. But you still separate devices at the hardware level; in this example, if the computer at the bottom With that, you could create 65, subnets with hosts each, which would fill up a truck full of routers.
Rather than including the entire subnet mask when writing it out, you can use a shorthand called CIDR notation. For example, the subnet mask This lets you easily know which numbers are the subnet ID, and how big the subnet is. Larger CIDR blocks have lower numbers. You can view a full list of them here on Wikipedia.
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