![]() So if we incorrectly configure two hosts which are on the same physical network with the following IP addresses and mask. ![]() The mask is important as hosts on the same network can talk to each other without a router whereas if they are on a different network then they need a router. Then network is 10.0 and host is 1.1 Understanding The Importance Of the Subnet Mask So if you have an IP address of 192.168.1.254 and a mask of 255.255.255.0 the network address is 192.168.1 and the host or node is 254. When you combine, using a logical AND, the IP address and the mask you reveal the network address. The purpose of the subnet mask is to split the IP address into the two components. ![]() House Number + Street name e.g 22 queen Street.įor computer networks the network number is equivalent to the street name and the house number is the Node Address. A typical IP address appears like this:Īn IP address has two components- A network component, and a node component.Īs an Analogy if you think of the address of your house it is of the form Where the value of a,b,c or d is between 0-255 decimal. These 32 bits are split into 4 bytes and each byte is separated by a dot(.). So what is a subnet mask and what does it do? and is it important?īefore we look at subnet masks you first need to understand IP addresses. However an IP address alone isn’t sufficient as you will also be require to enter a subnet mask. ![]() Setting up a device on a home network sometimes requires that you manually enter an IP address. ![]()
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