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Subnet mask table class a1/1/2023 ![]() ![]() So lets create our label we could use the following scheme: If we also say that classroom numbers 0 and 99 and computer numbers 0 and 99 were reserved and not allowed to be assigned then we now have a maximum of 98 classrooms and 98 computers which is enough for own requirements. ![]() We need two digits for the computer which would allow for a maximum of 100 computers (0-99). We need two digits for the classroom which would allow for a maximum of 100 classrooms (0-99). If we assign numbers to our classrooms and computers then we could have for example: Now say we have 30 classrooms each with a maximum of 30 students and computers. Now each classroom has a desk with a computer and we have been tasked with creating a labeling system for the computers. Subnet mask table class a how to#That will give you up to 14 networks shared among 14 hosts (nodes).What is Subnetting ?- Subnetting is the process of diving a network into small networks and is a common task on IPV4 networks.īefore we discuss how to implement it it is useful to understand why and when we need to do it and to do that we are first going to work through a simple analogy to illustrate the problem subnetting solves Subnetting AnalogyĪs an analogy imagine a school and we need to split it into class rooms.īut why split it into class rooms? The answer is to stop classes interfering with one another. So to give us 16 possible network numbers, 2 of which cannot be used:. Look at this because you will always come across it during subnetting This will limit us to 196 nodes (hosts) on the network instead of 254 we would have without subnetting. ![]() You can do this by subnetting this network with a subnet address.Īll you have to do is, try to create 14 subnets of 14 nodes (hosts) each. Given a class C network address of 192.168.1.0, as a network administrator, you need to utilize this network address across multiple small groups within the organization. With these three bits, it is possible to create eight subnets. In order to subnet a network address, The subnet mask has to be extended, using some of the bits from the host ID portion of the address to create a subnetwork ID.įor example, given a Class C network of 192.17.5.0 which has a natural mask of 255.255.255.0, you can create subnets in this manner:ġ92.17.5.0 – 11000000.00010001.00000101.00000000Ģ55.255.255.224 – 11111111.11111111.11111111.11100000īy extending the mask to 255.255.255.224, you have borrowed three bits (indicated by “sub”) from the original host portion of the address and used them to create subnets. It helps to control network traffic due to collisions of packets transmitted by other nodes (host) on the same segment. It helps in the preservation of address space in other not to waste addresses.Ĭ. IP Subnet allows you to create multiple logical networks that exist within a single Class A, B, or C network.Ī. ![]()
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