Unix System Administration Handbook 1997 October/usah_oct97.iso/rfc/1300s/rfc1302.txt

Text File | 1996-04-04 | 29KB | 731 lines

Network Working Group                                       D. Sitzler
Request For Comments: 1302                                       Merit
FYI: 12                                                       P. Smith
                                                                 Merit
                                                             A. Marine
                                                                   SRI
                                                         February 1992


         Building a Network Information Services Infrastructure

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Abstract

   This FYI RFC document is intended for existing Internet Network
   Information Center (NIC) personnel, people interested in establishing
   a new NIC, Internet Network Operations Centers (NOCs), and funding
   agencies interested in contributing to user support facilities.  The
   document strives to:

       - Define a basic set of essential services that Network
         Information Centers (NICs) will provide to Internet users,
         including new mechanisms that will facilitate the timely
         dissemination of information to the Internet community and
         encourage cooperation among NICs.

       - Describe existing NIC services as an aid to Internet users
         and as a model for organizations establishing new NICs.

Acknowledgments

   This document reflects the work of the Network Information Services
   Infrastructure (NISI) working group in the User Services area of the
   IETF.  Because the working group participants represent a cross-
   section of existing Internet NICs, the opinions expressed herein are
   representative of groups currently providing information services
   within the Internet community.









Sitzler, Smith, & Marine                                        [Page 1]

RFC 1302                          NISI                     February 1992


Table of Contents

   1. PURPOSE........................................................  2
   2. DEVELOPMENT GUIDELINES.........................................  3
   3. DEFINITION OF A NIC AND A NOC..................................  3
   4. HISTORY........................................................  3
   5. ESSENTIAL NIC FUNCTIONS........................................  5
   5.1 Provide Information Resources.................................  5
   5.2 Support End-Users.............................................  6
   5.3 Collect and Maintain NIC Referral Information.................  7
   5.4 Support the NIC Infrastructure................................  7
   6. EXAMPLES OF PRESENT NIC SERVICES...............................  8
   6.1 Direct User Support...........................................  8
   6.1.1 Referrals...................................................  8
   6.1.2 User-to-User Communication..................................  8
   6.1.3 Application Support.........................................  9
   6.1.4 Technical Support...........................................  9
   6.1.5 Emergency Services..........................................  9
   6.2 User Training Services........................................  9
   6.3 Marketing and Public Relations Services.......................  9
   6.3.1 Newsletters.................................................  9
   6.3.2 Other Publications..........................................  9
   6.3.3 PR Activities...............................................  9
   6.4 Information Repository Services...............................  9
   6.5 Administrative Services....................................... 10
   7. EXAMPLES OF PRESENT INFORMATION DELIVERY MECHANISMS............ 10
   8. DATABASE ACCURACY ISSUES....................................... 11
   9. SECURITY CONSIDERATIONS........................................ 12
   10. AUTHORS' ADDRESSES............................................ 13

1. PURPOSE

   The purpose of this document is to define the role of NICs in the
   Internet and establish guidelines for new and existing NICs regarding
   the user services they provide.  This document is also a move toward
   standardizing NIC services, which will aid in the development of an
   overall information infrastructure that will allow NICs to easily and
   routinely cooperate in assisting users.

   NICs for networks that are part of the Internet may be called upon to
   serve users of the greater Internet as well as those of their own
   networks.  This responsibility brings with it the added challenge of
   coordinating services with other NICs to better serve the general
   Internet community.  Toward that end, this document also proposes
   some easily implemented changes to facilitate the exchange of
   information and services between NICs.





Sitzler, Smith, & Marine                                        [Page 2]

RFC 1302                          NISI                     February 1992


2. DEVELOPMENT GUIDELINES

   The NISI working group observed several guidelines when developing
   this FYI RFC.

     1.  While recognizing that the new infrastructure should be built
     on existing services, programs, and technology, the working group
     did not want to limit its thinking to the present, preferring to
     consider new approaches and to think toward the future.  The goal
     is to move in the direction of an information services
     infrastructure for the National Research and Education Network
     (NREN).

     2.  The working group recognizes that a user support system must
     accommodate a diverse user population, from novice to network
     sophisticate.

     3.  The working group recognizes that not all NICs are interested
     in providing service at the Internet level nor in providing service
     directly to end users.  Some NICs have special areas of interest
     and serve a more limited community.  Many campus NICs, for example,
     restrict the scope of their efforts to campus computing activities.
     Therefore, an Internet NIC must have policies, procedures, and
     delivery mechanisms in place to serve not only end-users, but to
     aid other information providers and user support agencies.

3.  DEFINITION OF A NIC AND OF A NOC

   A Network Information Center is an organization whose goal is to
   provide informational, administrative, and procedural support,
   primarily to users of its network and, secondarily, to users of the
   greater Internet and to other service agencies.

   A Network Operations Center (NOC) is an organization whose goal is to
   oversee and maintain the daily operations of a network.  Although
   sometimes one organization may fulfill the duties of both a NIC and a
   NOC, this document assumes NIC functions to be separate from NOC
   functions and addresses NIC functions only.  Obviously, however, a
   NIC must work closely with its NOC to ensure users get the best
   service possible.

4.  HISTORY

   When the original Advanced Research Projects Agency Network (ARPANET)
   was formed, SRI was assigned the essential administrative task of
   registering every host on the network and maintaining the Official
   Host Table.  This host table was needed to interconnect the hosts
   into a network.  SRI also became the repository for the RFCs, most of



Sitzler, Smith, & Marine                                        [Page 3]

RFC 1302                          NISI                     February 1992


   which were only available in paper copies because a file transfer
   protocol had yet to be specified.  Because of its role as a central
   information repository in these ways, SRI became the natural place
   for users to call with questions, and the first NIC was born.

   In 1984, the original network split into two networks: the ARPANET
   and the MILNET.  The ARPANET was laid to rest in 1990, and the
   original NIC became the Defense Data Network NIC (DDN-NIC).  This NIC
   was sometimes referred to as the "SRI-NIC" or sometimes simply as
   "the NIC".  Today this NIC is maintained by Government Systems, Inc.,
   and provides information services to the MILNET portion of the DDN,
   as well as performing several administrative duties that serve the
   entire Internet community.  SRI continues to provide general Internet
   information services and maintains an FTP repository.

   The days of having just one or two networks are long gone.  Today,
   the Internet is an international collection of thousands of networks
   interconnected with the TCP/IP protocols.  Users of any one of these
   networks can use the network services provided by TCP/IP to reach any
   of the other networks.

   There are other major wide area networks, such as BITNET and DECnet
   networks, that are not based on the TCP/IP protocols and are thus not
   considered part of the Internet itself.  However, users can
   communicate between these networks and the Internet via electronic
   mail, so Internet NICs often answer questions regarding these
   networks.

   NICs exist for many of the networks that make up today's Internet.
   For example, in addition to the MILNET, in the United States there
   are the National Science Foundation Network (NSFNET), the Energy
   Science Network (ESnet), and the NASA Science Internet (NSI).  All of
   these networks provide NICs.

   BITNET is a non-TCP/IP network that is accessible to the Internet via
   electronic mail.  Its administrative organization, the Corporation
   for Research and Educational Networking (CREN), supports NIC services
   for BITNET users.

   Many networks in countries other than the United States also provide
   NIC services.  For example, such services exist for NORDUnet, which
   connects national networks in the Nordic countries, and JANet, the
   Joint Academic Network in the United Kingdom.  The BITNET
   counterparts in Europe and Canada are the European Academic and
   Research Network (EARN) and NetNorth, respectively.






Sitzler, Smith, & Marine                                        [Page 4]

RFC 1302                          NISI                     February 1992


5.  ESSENTIAL NIC FUNCTIONS

   Network Information Centers exist to provide services that make using
   the network easier and more attractive to users.

   To help meet this goal, four essential NIC functions have been
   identified as those that every Internet NIC should perform.  These
   are the basic functions that define the minimum level of Internet
   information service.  Each Internet NIC should:

     - Provide information resources.
     - Support end-users through direct contact.
     - Collect and maintain NIC referral information.
     - Support the NIC infrastructure.

   The level of each service and the exact mechanisms for providing
   these services depend on the needs of the particular network user
   community.  Funding, staffing, and implementation issues related to
   these functions are left up to individual NIC organizations.

   Presently, only the first two functions, providing information
   resources and directly supporting end-users, are routinely performed
   by Internet NICs.  The variety of ways in which these services are
   provided is described more fully in the section on, "Examples of
   Present NIC Services".

   The last two functions, collecting information about other NICs and
   supporting the NIC infrastructure, are new roles that have evolved as
   the Internet community and the number of NICs have grown.

   Each of these four essential functions is discussed in some depth in
   this section.

5.1  Provide Information Resources

   Information resources refers to both online and hard-copy resources,
   such as online files, marketing information, and newsletters.  NICs
   help users gain access to relevant information in several ways.

     - Obtain information online from other sites and store
       it at the local NIC where users may access it.

     - Refer users to information stored at other locations
       around the Internet.  This option requires that each
       NIC maintain up-to-date information regarding such






Sitzler, Smith, & Marine                                        [Page 5]

RFC 1302                          NISI                     February 1992


       Internet resources.

     - Create information, such as newsletters, marketing
       information, tutorial files or documents, and make
       it available to users.  In this case, the "creating
       NIC" is solely responsible for the content and
       accuracy of the information provided.

   In all of the cases above, users need a way to verify the
   authenticity and currentness of the information.  Accordingly, each
   NIC should provide the following information for everything it makes
   available to its users and the Internet community: 1) a time stamp,
   2) a revision number, and 3) the name of the NIC that produced the
   document.  The NIC should also maintain contact information regarding
   the source of a file, but does not necessarily have to include such a
   contact in the online file.

5.2  Support End-Users

   A NIC serves as the principle source of network information for its
   end users.  NICs field a variety of user inquiries, such as requests
   for how to get connected to the Internet, how to locate and access a
   particular application on the network, how to determine an e-mail
   address, and how to solve operational problems.  Each NIC must take a
   best effort approach to responding to these inquiries and take
   responsibility for a user inquiry until it is resolved in some way.
   Resolution may be answering the question, referring the user to the
   appropriate information source, or coordinating with a NOC to resolve
   a user connectivity problem.

   To facilitate this role of information provider, the following
   delivery mechanisms are used:

     - Telephone "hotline" support.  All NICs need to be
       available to answer phone inquiries during the
       business day.

     - Electronic mail.  An electronic mail address acts as
       an electronic help desk.  For consistency, the
       electronic mail address should be of the form
       NIC@domain (e.g., [e-mail]).  Such a common
       addressing convention will move toward
       standardization of these "electronic help desks" and
       will increase the chance that users will know where
       to ask for help.  In addition, a user inquiry to a
       NIC e-mail address should either produce a human
       response or an up-to-date machine response that
       performs a triage function by advising the user



Sitzler, Smith, & Marine                                        [Page 6]

RFC 1302                          NISI                     February 1992


       where to go for particular categories of problems.
       For example, a message to [e-mail] could return a
       message alerting the user to the [e-mail]
       and the [e-mail] mailboxes, both of
       which provide information for NSFNET.

     - Electronic information transfer.  NICs should
       provide information in electronic form, and make it
       available across the Internet through mechanisms
       such as anonymous file transfer, electronic mail,
       and remote databases.

5.3  Collect and Maintain NIC Referral Information

   With the recent dramatic increase in the number of networks, users,
   and applications accessible via the Internet, it is impossible for
   any one NIC to maintain comprehensive, up-to-date information of all
   the services and information available.  Because such information is
   distributed among many NICs, it is essential for each NIC to be aware
   of other NICs and their areas of expertise.  Such shared information
   among NICs ensures that Internet users will be referred promptly to
   the correct information resource.

   In an effort to gather data about NICs and their resources,
   information will be solicited from each NIC and placed in a database
   called "nic-profiles".  This database will be available to all NICs.
   Such shared information among NICs ensures that Internet users will
   be referred promptly to the correct information resource.  For
   information regarding joining or using the nic-profiles database,
   send a message to [e-mail].

5.4  Support the NIC Infrastructure

   It is essential that each NIC take an active part in supporting the
   NIC/Internet infrastructure.  Two means of providing such support are
   suggested here.

     - Attend the IETF User Services Working Group (USWG).
       NICs are encouraged to participate in the USWG, an
       ongoing working group of the IETF, which is
       chartered to identify, discuss, and recommend
       solutions to user service issues.  The group meets
       regularly at the IETF meetings.  (Information about
       IETF meeting schedules, etc., is available for
       anonymous FTP from nnsc.nsf.net.  The directory is
       ietf.)  The USWG has spawned a variety of working
       groups dealing with specific user service topics.
       To join the USWG mailing list send an e-mail request



Sitzler, Smith, & Marine                                        [Page 7]

RFC 1302                          NISI                     February 1992


       to [e-mail].

     - Participate in nic-forum.  An electronic mailing
       list, "nic-forum", will provide NIC personnel with a
       means of soliciting information from other NICs,
       offering solutions to common problems, and posting
       information of general interest.  A NIC can register
       in the nic-forum, as well as provide information for
       the nic-profiles database, by sending a message to
       [e-mail].

6. EXAMPLES OF PRESENT NIC SERVICES

   There are a variety of ways through which existing NICs fulfill the
   basic requirements previously indicated under "Essential NIC
   Functions".

   Today's Internet NICs provide network users with a wide array of
   value-added services.  The types and levels of services vary for any
   particular NIC depending on a number of issues such as funding,
   audience served, available resources, and mission of the network
   organization.

   An overview of some of the services offered today by Internet NICs is
   listed below.  This overview provides examples of the essential
   services recommended earlier, and also gives a flavor of the many
   avenues through which value-added user services are provided.  This
   section provides examples, not recommendations.

6.1  Direct User Support

   The main objective of a Network Information Center is to provide
   support for network users.  Most NICs provide both telephone and
   electronic mail hotlines for convenient user access.  Existing NICs
   also often serve as intermediaries between users and the technical
   experts who provide specific information.  Because NICs interact
   directly with end-users, they can frequently evaluate their services,
   and modify them to accommodate changing user needs.

6.1.1 Referrals.  Today's NICs are aware of other Internet resources
      and keep such referral information as up-to-date as possible.

6.1.2 User-to-User Communication.  NICs can facilitate interactions
      between network users.  Often this is done through conferencing
      or electronic mail.  For example, a NIC can set up a computer
      conference dealing with a specific discipline or perhaps a
      specific topic so that users can share ideas and information
      with each other.  Some NICs establish special interest groups and



Sitzler, Smith, & Marine                                        [Page 8]

RFC 1302                          NISI                     February 1992


      hold in-person meetings to promote the exchange of information
      between their users.

6.1.3 Application Support.  NICs often provide user support for
      specific host applications in addition to providing information
      and support about the network to which the host is attached.

6.1.4 Technical Support.  Technical experts are available at NIC
      locations or elsewhere to trouble shoot user problems.  The range
      and variety of technical expertise varies with the organization.

6.1.5 Emergency Services.  Most NICs provide immediate notification to
      users of impending events that may affect their network usage.
      This is often done through electronic mail bulletins which state
      the particular event, its impact, and its duration.

6.2  User Training Services

   NICs sponsor seminars, classes, and training workshops intended to
   assist users in understanding the network environment.  These
   training events range from general "what is the Internet" to
   workshops on specific topics such as how to use a super-computer
   application.

6.3  Marketing and Public Relations Services

6.3.1 Newsletters.  Some Internet NICs publish newsletters which are
      used to inform subscribers about network developments and tools,
      and as marketing documents to try to get more organizations to
      attach to the network.

6.3.2 Other Publications.  Many NICs also produce a variety of
      general purpose brochures and "how-to" documents which are
      distributed to potential network users.

6.3.3 PR Activities.  NICs may be involved in a variety of public
      relations activities from writing and distributing press releases
      about new network developments to holding press conferences to
      announce significant technological events.

6.4  Information Repository Services

   An important activity of NICs is producing and/or collecting
   information of interest to their users.  Most NICs provide
   hardware to store such information online and distribute the
   information to their users both electronically and in hard-copy
   form.




Sitzler, Smith, & Marine                                        [Page 9]

RFC 1302                          NISI                     February 1992


6.5  Administrative Services

   Many NICs perform registration services, such as registering user
   information in a white pages database, keeping a record of hosts on
   their networks, or keeping a record of contacts for hosts, networks,
   or domains.

7. EXAMPLES OF PRESENT INFORMATION DELIVERY MECHANISMS

   Information is delivered to network users via a wide variety of
   mechanisms.  The most common methods are electronic mail and file
   transfer protocol (FTP); however, information is also relayed via the
   telephone, FAX machines, U.S. mail, and in-person seminars, as well
   as via electronic bulletin boards and remote database access.  NICs
   are always looking for ways of making information broadly accessible
   so that the maximum number of network users can use it effectively.

   The following table lists the various information delivery methods
   used in the Internet today, and notes the kind of information
   distributed using each method.


______________________________________________________________________


            Table 1: AVAILABLE INFORMATION AND DELIVERY MECHANISMS


  Delivery Mechanism               Type of Information Available
  ------------------------------------------------------------------

  FTP                              Network maps, functional specs,
                                   draft RFCs, newsletters,
                                   protocols, any information in
                                   a file: ASCII, binary, etc.

  electronic mail                  General information, newsletters,
                                   announcements, security alerts,
                                   network status information

  bulletin board                   General information, announcements,
                                   source code

  hard copy                        Newsletters, user guides, resource
                                   guides, press releases, promotional
                                   information





Sitzler, Smith, & Marine                                       [Page 10]

RFC 1302                          NISI                     February 1992


  presentations/seminars           Network applications, technology
                                   trends, technical overviews,
                                   general information about Internet
                                   environment, TCP/IP overviews

  Telnet                           Remote systems, applications

  person-to-person                 Answers to specific questions,
                                   contact information, referrals

  electronic conference            Other users, discipline-specific
                                   information

  information services             General information, promotional
                                   information, local interest
                                   information

  directory services               Phone book information (white
                                   pages, and eventually yellow pages)

  library services                 Bibliographies, full text,
                                   references

  phone                            Specific requests, contacts,
                                   referrals, connecting assistance

  U.S. mail                        Newsletters, user guides

  FAX                              Variety of printed material

  Finger, whois                    User data


 ______________________________________________________________________

8. DATABASE ACCURACY ISSUES

   As has been mentioned elsewhere in this paper, NICs often are the
   sites of databases of various types of information, which are
   maintained for various reasons.  It is recommended that NICs
   emphasize the importance of keeping such data as accurate as
   possible.  In addition, it is important to allow people some control
   over personal information about them that may reside in a NIC
   database, especially if the information will be available publicly.

   It is recommended that, as part of the process of collecting
   information for a database, a NIC should disclose the following
   information to those supplying data:



Sitzler, Smith, & Marine                                       [Page 11]

RFC 1302                          NISI                     February 1992


      - Why the information is being collected and how it will be used.
      - What the consequences are of not providing the asked for data or
        of revoking data in a database.
      - Which information asked for is mandatory and which is optional.
      - Which information will be made public.
      - How the data can be updated and who may provide updates.
      - How and how often the NIC will solicit for data updates.

   A NIC should actively seek updates to its data at least once a year.
   The date publicly available data was last updated should be part of
   the public information available about that data.  In general, users
   should know when personal information about them is available in a
   public database, and have the opportunity to change it or revoke it.

9. SECURITY CONSIDERATIONS

   Because NICs interact directly with network users, they will have to
   deal with network and host security issues at times.  NICs should be
   aware of those agencies and groups on the Internet that have the
   responsibility of handling security incidents so that users can be
   properly referred when necessary, and so the NICs themselves have
   resources to call on should a major incident occur.  NICs should be
   aware of security issues and security information resources, such as
   network mailing lists and the Site Security Handbook (FYI 8, RFC
   1244), and advocate the importance of security considerations to
   their users.  NICs should have explicit procedures in place to follow
   in the event of a security incident.  Such procedures will probably
   include the means of interacting with both response centers and NOCs,
   as well as with users.






















Sitzler, Smith, & Marine                                       [Page 12]

RFC 1302                          NISI                     February 1992


10. AUTHORS' ADDRESSES

   Dana D. Sitzler
   Merit Network, Inc
   1075 Beal Avenue
   Ann Arbor, MI 48109-2112

   Phone:  [phone]
   EMail: [e-mail]


   Patricia G. Smith
   Merit Network, Inc
   1075 Beal Avenue
   Ann Arbor, MI 48109-2112

   Phone:  [phone]
   EMail:  [e-mail]


   April N. Marine
   SRI International
   Network Information Systems Center
   333 Ravenswood Avenue, EJ294
   Menlo Park, CA 94025-3493

   Phone:  [phone]
   EMail: [e-mail]























Sitzler, Smith, & Marine                                       [Page 13]