February-March 2002
slideset 7 -18
Allocations
smaller than /24
nImagine a /25 address block delegated to a company by an
ISP
nThe company wants to maintain the reverse mapping of the
address they use
nIn the reverse DNS one can not delegate
nUse the 'classless inaddr' technique described in RFC 2317
nBased on the use of CNAME RRs
uCNAME provide a means to
alias names to another namespace