Ah, again; I forgot the range of private IP address. So, no more cursing of my memory. Now...instead of googling I will search on my blog :D
Below are permissible private IP ranges:
In below example, 10.0 is the network address and last two segments are device addresses.
Below are permissible private IP ranges:
- 10.0.0.0 - 10.255.255.255
- 172.16.0.0 - 172.31.255.255
- 192.168.0.0 - 192.168.255.255
These IP address are used for computers inside a network which needs to access inside resources. Routers inside the private network can route traffic between these private addresses. However, if they want to access resource in outside world (like internet) these network entities have to have a public address in order for response to reach to them. This is where NATing is used.
Representing IP address in CIDR format
The number following the forward slash (/) is the prefix length, the number of shared initial bits, counting from the most significant bit of the address.
Thus, a /20 block is a CIDR block with an unspecified 20-bit prefix.
In below example, 10.0 is the network address and last two segments are device addresses.
Reference: http://whatismyipaddress.com/nat
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