What is the difference b/w supernetting and subnetting difference?

Subnetting is dividing a network address into smaller set of subnets and Supernetting is other way round when we summarise various networks into one major network address.

Subnetting is the process of dividing an IP network in to sub divisions called subnets.

Supernetting is the process of combining several sub networks, which have a common Classless Inter-Domain Routing (CIDR) routing prefix. Suppernetting is also called route aggregation.

Subnetting: divides the network into subnetworks. this is usually perform by network administrator. 

Superneting: merges multiplenetwork/subnet address into single network. Routers automaticall calcualtes supernets. 

Subnetting is the process of dividing an IP network in to sub divisions called subnets. Computers belonging to a sub network have a common group of most-significant bits in their IP addresses. So, this would break the IP address in to two parts (logically), as the network prefix and the rest field. Supernetting is the process of combining several sub networks, which have a common Classless Inter-Domain Routing (CIDR) routing prefix. Suppernetting is also called route aggregation or route 

In Subnetting we take bits from Host portion of the ip address into network portion,to create new networks while reverse occure in super neting.. 

Process of dividing an IP network in to sub divisions is called subnetting. On the other hand Supernetting is the process of combining several IP networks with a common network prefix. Supernetting was introduced as a solution to the problem of increasing size in routing tables. Supernetting also simplifies the routing process. For example, the subnetworks 192.60.2.0/24 and 192.60.3.0/24 can be combined in to the supernetwork denoted by 192.60.2.0/23. In the supernet, the first 23 bits are the network part of the address and the other 9 bits are used as the host identifier. So, one address will represent several small networks and this would reduce the number of entries that should be included in the routing table.

Subnetting is the process of dividing an IP network in to sub divisions called subnets 

Supernetting is the process of combining several IP networks with a common network prefix

Subnetting---->

Process of dividing an IP network in to sub divisions is called subnetting. Subnetting divides an IP address in to two parts as the network (or routing prefix) and the rest field (which is used to identify a specific host). CIDR notation is used to write a routing prefix. This notation uses a slash (/) to separate the network starting address and the length of the network prefix (in bits). For example, in IPv4, 192.60.128.0/22 indicates that 22 bits are allocated for the network prefix and the remaining 10 bits are reserved for the host address. In addition, routing prefix can also be represented using the subnet mask. 255.255.252.0 (11111111.11111111.11111100.00000000) is the subnet mask for 192.60.128.0/22. Separating the network portion and the subnet portion of an IP address is done by performing a bitwise AND operation between the IP address and the subnet mask. This would result in identifying the network prefix and the host identifier.

Supernetting--->

Supernetting is the process of combining several IP networks with a common network prefix. Supernetting was introduced as a solution to the problem of increasing size in routing tables. Supernetting also simplifies the routing process. For example, the subnetworks 192.60.2.0/24 and 192.60.3.0/24 can be combined in to the supernetwork denoted by 192.60.2.0/23. In the supernet, the first 23 bits are the network part of the address and the other 9 bits are used as the host identifier. So, one address will represent several small networks and this would reduce the number of entries that should be included in the routing table. Typically, supernetting is used for class C IP addresses (addresses beginning with 192 to 223 in decimal), and most of the routing protocols support supernetting. Examples of such protocols are Border Gateway Protocol (BGP) and Open Shortest Path First (OSPF). But, protocols such as Exterior Gateway Protocol (EGP) and the Routing Information Protocol (RIP) do not support supernetting.

Subnetting is a process of dividing the network into smaller subnetworks by borrowing bits according to the hosts need in an specific network. However, supernetting is a process of combining multiple subnetworks to form a network, this practice is long gone in today's era, but good to have knowledge of.

Subnetting is deviding one network to multiple small Networks This used to save ip address for example I have 2 network each one have 100 users If I assign to the 2 network from class C which has 254 user I will loss 154 user at each network But If I subnet 1 network to 2 small network each one has 126 user I will save 1 network from class C and so on Supernetting is the vice versa to accumulate multible networks at 1 network This used for routing I have 3 consequences network at one direction from specfic router so it is better to tell the router 1 big network instead of 3 To better lookup in the routing table

supernets and subnets use the same underlying technology to accomplish different goals. Supernets seek to expand and simplify complicated network infrastructures by building routing tables that target multiple subnets in a single interface. Subnets, by contrast, break large networks into separate, smaller networks. Knowing when to apply one or the other can help you better organize your network.