service
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... effective use of the network will be determined by the quality and
coverage of Directory Services available.
...
...
Directory Services in this paper refers not only to the types of
services provided by the telephone companies ...
...
Directory Services in this paper refers not only to the types of
services provided by the telephone companies' White Pages ...
... companies' White Pages, but to
resource location, Yellow Pages services, mail address lookup, etc.
...
... address lookup, etc.
We will take a brief look at the services available today, and at the
problems they have, and then we will show how the X.500 standard
...
... CURRENT SERVICES AND THEIR LIMITATIONS ...
...
In the interests of brevity, we will only look at the WHOIS service,
and at the DNS. Each will illustrate a particular philosophy, if you
...
... and at the DNS. Each will illustrate a particular philosophy, if you
will, of Directory Services.
...
... database causes slow response during times of peak querying activity,
storage limitations, and also causes the entire service to be
unavailable if the link ...
... propagated, and also introduces another source of potential error in
the accuracy of the information. These particular problems affect to
different degrees any system which attempts to provide Directory
Services through a centralized database.
...
... necessarily cut off nameservice. However, even though the DNS is
superlative at providing these services, there are some problems when
we attempt to provide other Directory Services in the DNS ...
... superlative at providing these services, there are some problems when
we attempt to provide other Directory Services in the DNS. First, the
DNS ...
... Standards-Based Directory Services: ...
... backbone of a global White Pages service. There is almost 3 years of
operational experience with X.500, and it is being used widely in
...
... namespace is consistent, the information in the Directory can be
accessed by any implementation. Also, work is being done in providing
Yellow Pages services and other information resource location tasks
in the Directory.
...
... Directory, while increasing rapidly in the last two years, is still
not able to provide real-time directory services for such things as
routing protocols. However, work is being done to speed up service ...
... directory services for such things as
routing protocols. However, work is being done to speed up service.
...
... X.500 and an extensive
bibliography, see "Technical Overview of Directory Services Using the
X.500 Protocol", by Weider, Reynolds, and Heker. This is available
...