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The default subnet masks are as follows: What if you wanted more than 1 subnet?Subnetting allows you to create multiple logical networks that exist within a single Class A, B, or C network.On the client side, a default gateway is assigned in the TCP/IP properties.The default gateway tells the client the IP address of the router that will allow their computer to communicate with clients on other networks.IP addresses are divided into 3 classes as shown below: NOTE: 127.x.x.x is reserved for loopback testing on the local system and is not used on live systems.
This new addressing scheme utilizes a 128 bit address (instead of 32) and utilizes a hex numbering method in order to avoid long addresses such as 1..126.96.36.199.188.8.131.52.201.5.
Instead, by using classless addressing 1.0/24 puts these systems on a different network than 1.0/24 because the network names here are 1 and 1 which are different.
NAT - NAT stands for Network Address Translation and is a commonly used IP translation and mapping technology.
Classful versus Classless addressing the original TCP/IP addressing method described above was called classful addressing which worked by dividing the IP address space into chunks of different sizes called classes.
Classless addressing is referred to as Classless Inter-Domain Routing (CIDR) and is done by allocating address space to Internet service providers and end users on any address bit boundary, instead of on 8-bit segments.So 1.0 does not have to use the standard subnet mask of 255.255.0.0 which makes a Class B address space and which also puts it on the same network as 1.0 using the subnet mask of 255.255.0.0.