Classless Inter-Domain Routing, or CIDR, is a much more efficient way of allocating IP addresses. It’s worth noting, however, that the classful IP addressing is outdated. It is used for experimental and study purposes. However, if you’re using a VPN, your IP will change depending on the server you’re connected to.Ĭlass E ranges from 240 to 255 and also doesn’t have a subnet mask. The subnet mask reflects the network portion in an IP address. The first three octets (192.168.123.) represent the network and the last octet identifies a machine on your network.
Just like every address is defined by a street name and a house number, an IP address consists of a network component and a host component.
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