I do have basic understanding of IP Address which is unique address for each System either in an organization or over the internet. But i want to understand what is IP address range

Lets Say we have below IP'S in my company

  3. 10.450.90.10

Will represent IP range of my organization or it should be something like

I have few questions or clarification

  1. I am not aware of significance of value after / , i have seen IP address range like what does /16 or /22 represent

  2. If i set firewall rule to allow communication for all IPs of my compnay will below IP address range take care of it . should i assume that any IP address that start with 10. will be part of this address range ?


Generally private ip ranges address are in between to to -

Above mentioned private address range can be used in organising for allocation of ip addres to servers PC s and cameras and network devices

To understand significance of , ip address and subnet mask concepts has to be reviewed

/22 is subnet mask .


Subnet mask desides length of ip address range , Subnet mask is a mask used to determine what subnet an IP address belongs to. An IP address has two components, the network address and the host address. For example, consider the IP address Assuming this is part of a Class B network, the first two numbers (172.16) represent the Class B network address, and the second two numbers (10.5) identify a particular host on this network


The number behind the / is the prefix length. /16 means, that 16 bits of the ip address are the network portion, and 16 bits are used to address hosts. It tells you which bits of the subnet mask are set to 1.

/16 can also be written as:


And when you translate this to decimal:

Try the same with /22 or /8 or /29 or /24

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