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subnetting

Internet Protocol (IP) Subnet masking

Posted Thu, 09/29/2011 - 00:42 by anandsoft

A subnet mask enables you to identify the network and node parts of the address. The network bits are represented by the 1s in the mask, and the node bits are represented by the 0s. A logical AND operation between the IP address and the subnet mask provides the Network Address.

For example, consider the following IP address and the default Class C subnet mask

192.189.210.078 and subnet mask 255.255.255.0

We can get the network and host portions of the address by using AND operator on the binary equivalent of these addresses as below:

Internet Protocol (IP) Subnet masking

Posted Mon, 02/01/2010 - 01:55 by anandsoft

Summary:
Subnetting an IP Network is done primarily for better utilization of available IP address space, and routing purpose. Other reasons include better organization, use of different physical media (such as Ethernet, WAN, etc.), and securing network resources.

Body:
A subnet mask enables you to identify the network and node parts of the address. The network bits are represented by the 1s in the mask, and the node bits are represented by the 0s. A logical AND operation between the IP address and the subnet mask provides the Network Address.

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