CIDR is a method used to create unique identifiers for networks, as well as individual devices. For IPv4, networks can also be characterized using a subnet mask, which is sometimes expressed in dot-decimal notation, as shown in the "Subnet" field in the calculator. All hosts on a subnetwork have the same network prefix, unlike the host identifier, which is a unique local identification. In IPv4, these subnet masks are used to differentiate the network number and host identifier.
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Learn more. Asked 12 years, 1 month ago. Active 12 years, 1 month ago. Viewed k times. Improve this question. See serverfault. Seems a little homeworkish — MDMarra. Add a comment. Active Oldest Votes. Improve this answer. Ali Mezgani Ali Mezgani 3, 2 2 gold badges 22 22 silver badges 35 35 bronze badges.
For more details, read up on "CIDR notation". Joe H. This by far the most precise and clear answer.
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