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You can use a subnet calculator like:<br />
<a href="http://www.subnet-calculator.com/" rel="ugc">http://www.subnet-calculator.com/</a>
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i want to understand mathematical operations <br />
i already check this site
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Here is a good start for understanding the math involved:<br />
<a href="http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml" rel="ugc">http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml</a>
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If you want. Pull up the basic Windows calculator. Change it to scientific view (programmer in Vista/7) and use the BIN and DEC radio buttons to type numbers in binary and convert them to decimal.
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for example <br />
if the network address is 156.233.0.0 <br />
after subnetting there is 126 subnets and &nbsp;500 hosts in each subnet. <br />
<br />
after done some mathematical calculation to calculate new mask<br />
i got :<br />
255.255.255.0<br />
am i &nbsp;correct ?
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Not quite. You have a /24 subnet here, meaning 8 bits left for the host part. That means 2^8 256 addresses in a subnet: 156.233.0.0-156.233.0.255<br />
<br />
Try it the other way around. You want 500 hosts in a subnet. Then you'll need atleast 2^9 = 512 addresses in the subnet, so 9 bits. That leaves 23 bits for the mask so well get 255.255.254.0 as a subnet mask (156.233.0.0-156.233.1.255<wbr />). And 128 subnets for that matter.
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<div class="content wysiwyg-content">
Hi<br />
<br />
if i given network address, number of subnet and number of hosts ?<br />
how i can find new network mask ?<br />
please provide explain with example<br />
<br />
thanks in advanced
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Hi

if i given network address, number of subnet and number of hosts ?
how i can find new network mask ?
please provide explain with example

thanks in advanced

You can use a subnet calculator like:
http://www.subnet-calculator.com/

i want to understand mathematical operations 
i already check this site

Here is a good start for understanding the math involved:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml

If you want. Pull up the basic Windows calculator. Change it to scientific view (programmer in Vista/7) and use the BIN and DEC radio buttons to type numbers in binary and convert them to decimal.

for example 
if the network address is 156.233.0.0 
after subnetting there is 126 subnets and  500 hosts in each subnet. 

after done some mathematical calculation to calculate new mask
i got :
255.255.255.0
am i  correct ?

Not quite. You have a /24 subnet here, meaning 8 bits left for the host part. That means 2^8 256 addresses in a subnet: 156.233.0.0-156.233.0.255

Try it the other way around. You want 500 hosts in a subnet. Then you&#39;ll need atleast 2^9 = 512 addresses in the subnet, so 9 bits. That leaves 23 bits for the mask so well get 255.255.254.0 as a subnet mask (156.233.0.0-156.233.1.255). And 128 subnets for that matter.

subnetting and mask

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.

Network Architecture

Telecommunication occurs when the exchange of information between two or more entities (communication) includes the use of technology. Communication technology uses channels to transmit information (as electrical signals), either over a physical medium (such as signal cables), or in the form of electromagnetic waves. The word is often used in its plural form, telecommunications, because it involves many different technologies.

Telecommunications

The Math / Science topic primarily includes discussions of mathematics, physics, statistics and economic analysis, but also biology, chemistry and other sciences.