Address Space
Click on the red underlined text to get to the source
... IN-ADDR.ARPA delegation on non-
octet boundaries for address spaces covering fewer than 256
addresses. The proposed method ...
... With the proliferation of classless routing technology, it has become
feasible to assign address space on non-octet boundaries. In case of
a very small organization with only a few hosts, assigning a full
...
... One of the problems encountered when assigning a longer prefix (less
address space) is that it seems impossible for such an organization
to maintain its own reverse ("IN-ADDR.ARPA") zone autonomously. By
...
...
Let us assume we have assigned the address spaces to three different
parties as follows:
...
... zone can only be delegated once, and this usually translates into
"this zone can only be administered by one organization." The other
organizations with address space that corresponds to entries in this
zone would thus have to depend on another organization for their
address ...
... address and
the network mask length (as shown below) in the corresponding address
space to form the the first component in the name for the zones. The
following four zone files show how the problem in the motivation
section could be solved using this method ...
... resource records in the parent zone once and for all, if the way the
address space is partitioned is known.
...
...
This technique is intended to be used for delegating address spaces
covering fewer than 256 addresses. For delegations ...
... address and
the network mask length in the corresponding address space, to name
the new zones is to use some other (non-numeric) name. Thus it is
also possible to point to an entirely different part of the DNS tree ...
... Note that one cannot provide CNAME referrals twice for the same
address space, i.e. you cannot allocate a /25 prefix to one
organisation, and run IN-ADDR.ARPA ...
... in the IN-ADDR.ARPA domain, thus making it possible to assign address
space more efficiently without losing the ability to delegate the DNS
authority ...