RFC 950:Internet Standard Subnetting Procedure
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Internet network


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... to the interpretation of Internet addresses. In this view, a given Internet network is divided into a collection of subnets. ...
... Acquire a distinct Internet network number for each cable; subnets are not used at all. ...
... The second approach requires some convention or protocol that makes the collection of LANs appear to be a single Internet network. For example, this can be done on LANs where each Internet address ...


... Suppose that an organization has been assigned an Internet network number, has further divided that network into a set of subnets ...
... The first and second situations imply that the address mask is identical with the Internet network number mask. In the third situation, there is no way to determine what the proper value is; the safest choice is thus a mask identical with the Internet network ...
... Internet network number mask. In the third situation, there is no way to determine what the proper value is; the safest choice is thus a mask identical with the Internet network number mask. Although this might later turn out to be wrong, it will not prevent transmissions that would otherwise succeed. It is possible for a host ...


... A single Internet network (which may or may not be divided into subnets). ...
... One or more physical networks forming a subset of an Internet network. A subnet is explicitly identified in the Internet address. ...



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