Network Diagram Different Subnet Masks

2 the bits corresponding to the subnet mask with all 1 s represent the network id as it is a class a network and the first octet represents the network id. In the following diagram there is a subnet mask for a class c address. Applying the subnet mask to an ip address splits the address into two parts an extended network address and a host address.

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Let s quickly go over the setup which i thrown into packet tracer as a quick test config.

Network diagram different subnet masks. Following are the ranges of class a b and c internet addresses each with an example address. The subnet mask is 255 255 255 128 which when translated into bits indicates which bits of the host part of the address will be used to determine the subnet number. Each of the address classes has a different default subnet mask. After subnetting a packet is sent to the computers those network id matches with the subnet.

However the more subnets available the less host addresses available per subnet. A class c network would have a subnet mask of 255 255 255 0 which means that 24 bits are used for the network. 1 16 the practice of dividing a network into two or more networks is called subnetting. It also introduced a new method of denoting network masks.

The more host bits you use for a subnet mask the more subnets you have available. For example if there are six computers over lan with to subnet. So now our source and destination address and subnet masks are. What happens same ip range different subnet mask.

You can identify the class of an ip address by looking at its first octet. 192 168 1 168 24 in cidr. So let s say that the first ip address 192 168 0 2 has a subnet mask of 255 255 255 0. Ip address 192 168 1 168 subnet mask 255 255 255 0 is written as.

A subnetwork or subnet is a logical subdivision of an ip network. Class a networks use a default subnet mask of 255 0 0 0 and have 0 127 as their first octet. In cidr notation this is designated by a 24 following the ip address. The other ip address is 192 168 1 2 and has a subnet mask of 255 255 254 0.

The bits corresponding to all 0 s of the subnet mask is the host id. For example a class c network of 204 17 5 0 and a mask of 255 255 255 224 27 allows you to have eight subnets each with 32 host addresses 30 of which could be assigned to. A subnet mask neither works as an ip address nor does it exist independently of ip addresses. Instead subnet masks accompany an ip address and the two values work together.

Of course more bits borrowed means fewer individually addressable hosts that can be on the network. Thus the network id is 10 and the host id is 20 12 2 3 from the given subnet we can also calculate the ip range of a particular network. Each subnet has three computers with a subnet mask of 192 168 1 1 24 and 192 168 2 1 24 respectively when an incoming packet comes into the lan the router broadcast packet to only three machines. Because we are still using 24 subnet masks we know these two devices are in different subnets since the third octet for each is different.

Computers that belong to a subnet are addressed with an identical most significant bit group in their ip addresses this results in the logical division of an ip address into two fields the network number or routing prefix and the rest field.