![]() Ultimately, both techniques are used to increase the availability of the IP addresses and reduce the depletion of IP addresses.Experts agree that we retain only 10% of what we read but 90% of what we do. Conversely, supernetting is used to combine the smaller range of addresses into a larger one to make routing process more easy and fast. Subnetting and supernetting both the terms have inverse meaning where subnetting is used to separate the smaller subnetworks form each other by dividing a larger network. When merged, it lacks covering different areas.The whole network should exist in the same class.The combination of blocks should be made in power 2 alternatively, if the three blocks are required, then there must be assigned four blocks.It requires trained administrator to perform subnetting.Provision for the router to isolate the topology changes from the other routers.It also increases the speed of routing table lookup.The size of the router memory table is minimized by summarizing several routing information entries into a single entry.Subnets are easy to maintain and manage.The network security can be readily employed between subnets rather than employing it in the whole network.Increases the number of allowed hosts in local area network.Minimizes the network traffic through decreasing the volume of broadcasts.VLSM is a method of subnetting whereas CIDR is a supernetting technique. ![]() As against, in supernetting, the mask bits are moved left of the default mask. In order to perform subnetting the mask bits are repositioned towards the right of the default mask.Conversely, in supernetting, the host part bits of the address are increased. The subnetting process involves the increment of network part bits from the IP address.On the contrary, supernetting is the technique of merging multiple networks into a single one. The strategy used to divide a huge network into smaller subnetworks is known as subnetting.Key Differences Between Subnetting and Supernetting In simpler words, CIDR allows the IP addresses to be organized in the subnetworks independent of the value of the addresses. CIDR (Classless Inter-Domain Routing) is scheme used to route the network traffic across the internet. CIDR is a supernetting technique where the several subnets are combined together for the network routing. The supernetting is performed by internet service provider rather than the normal users, to achieve the most efficient IP address allocation. It results in the creation of more host addresses at the expense of network addresses, where basically the network bits are converted into host bits. The supernetting is also known as router summarization and aggregation. While performing supernetting, the mask bits are moved toward the left of the default mask. Supernetting is inverse process of subnetting, in which several networks are merged into a single network. Furthermore, when the number of hosts is same in subnets, that is known as FLSM (Fixed Length Subnet Mask). VLSM (Variable Length Subnet Mask) is a technique which partitions IP address space into subnets of different sizes and prevent memory wastage. The subnetting permits the administrator to partition a single class A, class B, class C network into smaller parts. As mentioned above the subnetting strategy was initially devised for slowing down the depletion of the IP addresses. ![]() The Subnetting basically convert the host bits into the network bits. A subnet is constructed by accepting the bits from the IP address host portion which are then used to assign a number of small-sized sub-networks in the original network. ![]() An IP address is made up of the combination of the network segment and a host segment. Subnetting is a technique of partitioning an individual physical network into several small-sized logical sub-networks.
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