What is subnetting ?
Subnetting is the work of breaking down a single net into one or more smaller networks called “ sub-networks ” or “ subnets ” for short-circuit. The process of subnetting was initially created to solve the dearth of IP addresses over the internet but has since evolved into an IP management best practice for IP network utilization .
Every IP cover is comprised of three different classes or major networks – Class A, Class B, and Class C. Without subnets, you ’ d entirely be able to use one net from each class, which isn ’ t the most efficient way to work.
Subnetting allows network administrators to take bits from the IP address ’ s host separate and use these bits to create smaller networks inside the network. These smaller networks are built up of many other IP addresses sharing the lapp IP routing prefix as the original IP address used to create the subnets. once you have these smaller networks, you create a network of interconnecting subnetworks to distribute your network ’ randomness warhead more efficiently .
It ’ second critically significant for network administrators in bombastic enterprises to subnet because reorganizing the network in such a way makes it more functional. For a single IP subnet to handle everything happening in a big enterprise, it would have to be fabulously large—which means it would be inherently unwieldy .
You might end up with :
- Unnecessary network traffic from hosts handling broadcasts sent over a single subnet
- Network security concerns caused by secured and unsecured servers using the same subnet
- A poorly organized overall structure
What is a subnet mask ?
A subnet mask is a 32-digit total determining the possible range of IP addresses available in a network. One subnet mask limits how many IP addresses can exist on a single network, but multiple subnet masks can be used to organize an entire net into sub-subnets .
A subnet mask besides indicates which depart of the IP savoir-faire refers to the host and which function refers to the subnet. class A, B, and C networks have nonpayment masks, and an IP address on an unsubnetted class A, B, or C network would have an address/subnet mask pair exchangeable to the default mask. To find which share is the host and which share is the subnet, you must convert both numbers to binary star numbers. This makes it easier to differentiate the host from the subnet. Address bits corresponding to 1 in the IP classify ’ s default mask represent the subnet, and address bits corresponding to a 0 in the default mask represent the host .
By using CIDR notation, our subnet mask calculator can help you easily find the subnet mask—no binary star code conversion necessary .
Why should I subnet a network ?
You should use a network subnet calculator to subnet your net for three primary reasons .
- Organizational Efficiency: When it comes to partitioning a large enterprise’s network and dividing resources accordingly, subnetting the network gives you several different options. For example, if you divide your network into subnets based on departments, you’ll be able to easily identify which department is having problems by looking at the IP address alone. This facilitates faster troubleshooting and makes it easier for you to find info related to a specific department. Subnetting with the help of a network subnet calculator allows you to compartmentalize and organize your network in a logical manner.
- Network Security: One of the biggest disadvantages of working within an unsubnetted network is it can compromise network security. When devices use the same subnet, these devices can freely communicate with one another and share information. This can pose a problem if a server containing sensitive information and an employee workstation share the same subnet. At best, an employee might accidentally gain access to confidential information. At worst, a cyberattacker could gain access to confidential information and critical systems housed on the subnet by leveraging access to an employee workstation. Subnetting allows you to set and maintain clear barriers within the network to control departmental access.
- Operational Efficiency: Network administrators first started subnetting because creating and setting aside millions of unused IPv4 was a waste of time and effort. Extending the range of your IP addresses by creating subnets helps you scale and makes your network more functional. If you have too many subnet masks, changing the size of the subnet by adjusting the subnet mask will free up more IP addresses for other subnets. Subnetting makes better use of your organization’s existing IP addresses and network resources.
These three benefits are lone the begin when it comes to subnetting—a network subnet calculator can help you unlock even more .
How to calculate a subnet
Without a subnet calculator, you can subnet IP address manually using the binary star method acting. To make a class A, B, or C default subnet mask larger, convert the subnet mask to a binary star issue and borrow bits from the host ID part of the IP address to create a subnetwork ID. After your calculations, you ’ ll be left with a list of possible subnets to use in your network .
If you don ’ t need the claim IP addresses of potential subnets but rather need to know how many subnets are contained within a given IP address, you only need a simple equality. Two to the office of adam equals the count of subnets, in which adam is the phone number of subnet bits. If the IP address has three subnet bits, then you can have two to the 3rd power of subnets, or eight total subnets.
not only is it time-consuming to manually calculate the full IP addresses of possible subnets, but it ’ randomness besides an erring action. A subnet calculator automates the process of calculating a subnet and helps ensure an accurate solution .