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1.1     ! root        1: % -*- LaTeX -*-                (really SLiTeX)
        !             2: 
        !             3: \def\emph#1{\underline{#1}}
        !             4: \font\xx=cmbx10
        !             5: \font\yy=cmbx7
        !             6: 
        !             7: \documentstyle[blackandwhite,landscape,oval,pagenumbers,small]{NRslides}
        !             8: 
        !             9: \raggedright
        !            10: 
        !            11: %\input trademark
        !            12: \let\tradeNAMfont=\relax
        !            13: \let\tradeORGfont=\relax
        !            14: 
        !            15: \begin{document}
        !            16: 
        !            17: \title {OSI Directory Services}
        !            18: \author        {Christopher W.~Moore\\ The Wollongong Group, Inc.}
        !            19: \date  {December 13, 1988}
        !            20: \maketitlepage
        !            21: 
        !            22: \begin{bwslide}
        !            23: \part* {Agenda}
        !            24: 
        !            25: \begin{description}
        !            26: \item[Part I:]         Introduction to Directory Services
        !            27: \item[Part II:]                Directory Services in Detail
        !            28: \item[Part III:]       Upper Layer Requirements
        !            29: \item[Part IV:]                Reference Points
        !            30: \item[Part V:]         Conclusions
        !            31: \end{description}
        !            32: \end{bwslide}
        !            33: 
        !            34: \begin{bwslide}
        !            35: \ctitle {Part I: Introduction to Directory Services}
        !            36: \end{bwslide}
        !            37: 
        !            38: \begin{bwslide}
        !            39: \ctitle        {Introduction}
        !            40: 
        !            41: \begin{nrtc}
        !            42: \item  Specialized distributed database
        !            43: \item  Holds and provides access to information about objects
        !            44: \item  OSI application
        !            45: \end{nrtc}
        !            46: \end{bwslide}
        !            47: 
        !            48: \begin{bwslide}
        !            49: \ctitle {Scope \& Field of Application}
        !            50: 
        !            51: \begin{nrtc}
        !            52: \item  Provide Directory Capability Required by:
        !            53:        \begin{nrtc}
        !            54:        \item   OSI Applications
        !            55:        \item   OSI Management Processes
        !            56:        \item   OSI Layer Entities
        !            57:        \end{nrtc}
        !            58: \item  ``User Friendly'' Naming --- Name to Address Mapping
        !            59: \end{nrtc}
        !            60: \end{bwslide}
        !            61: 
        !            62: \begin{bwslide}
        !            63: \ctitle        {Scope \& Field (cont.)}
        !            64: 
        !            65: \begin{nrtc}
        !            66: \item  Is NOT a General-Purpose Database itself;  but,
        !            67: \item  May be built on a General-Purpose Database
        !            68: \item  Transient Conditions
        !            69: \item  More Frequent Queries than Updates
        !            70: \end{nrtc}
        !            71: \end{bwslide}
        !            72: 
        !            73: \begin{bwslide}
        !            74: \ctitle {Scope \& Field (cont.)}
        !            75: 
        !            76: \begin{nrtc}
        !            77: \item  Query results independent
        !            78:        \begin{nrtc}
        !            79:        \item   Identity
        !            80:        \item   Location
        !            81:        \end{nrtc}
        !            82: \item  Variances
        !            83:        \begin{nrtc}
        !            84:        \item   Differing access rights
        !            85:        \item   Unpropagated updates
        !            86:        \end{nrtc}
        !            87: \end{nrtc}
        !            88: \end{bwslide}
        !            89: 
        !            90: \begin{bwslide}
        !            91: \ctitle {Directory and Users}
        !            92: 
        !            93: \begin{nrtc}
        !            94: \item  Directory user
        !            95:        \begin{nrtc}
        !            96:        \item   Person
        !            97:        \item   Application process
        !            98:        \end{nrtc}
        !            99: \item  Services obtained by accessing the directory
        !           100: \item  Access achieved through directory user agent, {\em DUA}
        !           101: \end{nrtc}
        !           102: \end{bwslide}
        !           103: 
        !           104: \begin{bwslide}
        !           105: \ctitle        {Directory and Users}
        !           106: 
        !           107: \vskip.5in
        !           108: \diagram[p]{figure1}
        !           109: \end{bwslide}
        !           110: 
        !           111: \begin{bwslide}
        !           112: \ctitle {Directory Information Base\\ (DIB)}
        !           113: 
        !           114: \begin{nrtc}
        !           115: \item  Information model
        !           116: \item  All information to which the Directory provides access
        !           117: \item  Not concerned with distributed or centralized architecture
        !           118: \end{nrtc}
        !           119: \end{bwslide}
        !           120: 
        !           121: \begin{bwslide}
        !           122: \ctitle {Directory Access\\ ( Abstract Service )}
        !           123: 
        !           124: \begin{nrtc}
        !           125: \item  Services provided to DUAs through access points
        !           126: \item  Access point supports a specific combination of services, {\em Ports}
        !           127: \item  Ports define particular types of interaction with the directory
        !           128: \end{nrtc}
        !           129: \end{bwslide}
        !           130: 
        !           131: \begin{bwslide}
        !           132: \ctitle {Objects}
        !           133: 
        !           134: \begin{nrtc}
        !           135: \item  Many types of objects will be stored in the directory
        !           136: \item  An object may be used by multiple applications
        !           137: \item  General set of useful objects and attributes defined by Directory
        !           138: \item  Individual applications may define Directory objects and attributes
        !           139: \end{nrtc}
        !           140: \end{bwslide}
        !           141: 
        !           142: \begin{bwslide}
        !           143: \ctitle        {Part II: Directory Services in Detail}
        !           144: 
        !           145: \begin{nrtc}
        !           146: \item  Informational Model
        !           147: \item  Functional Model
        !           148: \item  Organizational Model
        !           149: \item  Security Model
        !           150: \item  Applying The Directory
        !           151: \item  The Directory Service
        !           152: \end{nrtc}
        !           153: \end{bwslide}
        !           154: 
        !           155: \begin{bwslide}
        !           156: \ctitle {Information Model\\ Directory Information Base}
        !           157: \begin{nrtc}
        !           158: \item  Composed of information about objects, {\em entries}.
        !           159: \item  Tree structure, {\em Directory Information Tree (DIT)}
        !           160: \item  Entries have {\em Distinguished Names}
        !           161: \item  Aliases
        !           162: \item  Schema
        !           163: \end{nrtc}
        !           164: \end{bwslide}
        !           165: 
        !           166: \begin{bwslide}
        !           167: \ctitle        {Information Model\\ DIT Structure}
        !           168: 
        !           169: \vskip.5in
        !           170: \diagram[p]{figure2}
        !           171: \end{bwslide}
        !           172: 
        !           173: \begin{bwslide}
        !           174: \ctitle        {Information Model\\ Entries}
        !           175: 
        !           176: \vskip.5in
        !           177: \diagram[p]{figure9}
        !           178: \end{bwslide}
        !           179: 
        !           180: \begin{bwslide}
        !           181: \ctitle        {Example Directory Tree}
        !           182: 
        !           183: \vskip.5in
        !           184: \diagram[p]{figure3}
        !           185: \end{bwslide}
        !           186: 
        !           187: \begin{bwslide}
        !           188: \ctitle {Functional Model}
        !           189: 
        !           190: \begin{nrtc}
        !           191: \item  The Directory is manifested by one or more DSAs
        !           192: \item  Directory System Agent, {\em DSA}
        !           193: \end{nrtc}
        !           194: \end{bwslide}
        !           195: 
        !           196: \begin{bwslide}
        !           197: \ctitle        {Functional Model}
        !           198: 
        !           199: \vskip.5in
        !           200: \diagram[p]{figure4}
        !           201: \end{bwslide}
        !           202: 
        !           203: \begin{bwslide}
        !           204: \ctitle {Operation of the Functional Model}
        !           205: 
        !           206: \begin{nrtc}
        !           207: \item  Interactions
        !           208:        \begin{nrtc}
        !           209:        \item   DUAs interact with one or more DSAs
        !           210:        \item   DSAs interact with other DSAs
        !           211:        \end{nrtc}
        !           212: \item  Referral
        !           213: \item  Chaining
        !           214: \end{nrtc}
        !           215: \end{bwslide}
        !           216: 
        !           217: \begin{bwslide}
        !           218: \ctitle        {Operation of the Model\\ Referral}
        !           219: 
        !           220: \vskip.5in
        !           221: \diagram[p]{figure5}
        !           222: \end{bwslide}
        !           223: 
        !           224: \begin{bwslide}
        !           225: \ctitle        {Operation of the Model\\ Referral (cont.)}
        !           226: 
        !           227: \vskip.5in
        !           228: \diagram[p]{figure6}
        !           229: \end{bwslide}
        !           230: 
        !           231: \begin{bwslide}
        !           232: \ctitle        {Operation of the Model\\ Chaining}
        !           233: 
        !           234: \vskip.5in
        !           235: \diagram[p]{figure7}
        !           236: \end{bwslide}
        !           237: 
        !           238: \begin{bwslide}
        !           239: \ctitle        {Operation of the Model\\ Multicasting}
        !           240: 
        !           241: \vskip.5in
        !           242: \diagram[p]{figure8}
        !           243: \end{bwslide}
        !           244: 
        !           245: \begin{bwslide}
        !           246: \ctitle {Organizational Model}
        !           247: \begin{nrtc}
        !           248: \item  Directory Management Domain, {\em DMD}
        !           249:        \begin{nrtc}
        !           250:        \item   One or more DSAs
        !           251:        \item   Zero or more DUAs
        !           252:        \item   External behavior (Multiple DSAs in a DMD)
        !           253:        \end{nrtc}
        !           254: \item  Administration Directory Management Domain, {\em ADDMD}
        !           255: \item  Private Directory Management Domain, {\em PRDMD}
        !           256: \end{nrtc}
        !           257: \end{bwslide}
        !           258: 
        !           259: \begin{bwslide}
        !           260: \ctitle        {Security Model}
        !           261: \end{bwslide}
        !           262: 
        !           263: \begin{bwslide}
        !           264: \ctitle {Security Model\\ Security Policy}
        !           265: 
        !           266: \begin{nrtc}
        !           267: \item  Various authorities provide access to parts of the DIB
        !           268: \item  Authorization Policy
        !           269:        \begin{nrtc}
        !           270:        \item   Specify access rights
        !           271:        \item   Enforce access rights {\em (Access control)}
        !           272:        \item   Maintain access rights
        !           273:        \end{nrtc}
        !           274: \item  Authentication Policy
        !           275:        \begin{nrtc}
        !           276:        \item   Identity of DSAs and directory users
        !           277:        \item   identity of received informations origin
        !           278:        \end{nrtc}
        !           279: \end{nrtc}
        !           280: \end{bwslide}
        !           281: 
        !           282: \begin{bwslide}
        !           283: \ctitle {Security Model\\ Local Matters}
        !           284: 
        !           285: \begin{nrtc}
        !           286: \item  Actual definition of a security policy
        !           287: \item  Specifying access rights {\em (Guidelines given)}
        !           288: \end{nrtc}
        !           289: \end{bwslide}
        !           290: 
        !           291: \begin{bwslide}
        !           292: \ctitle        {Applying the Directory}
        !           293: \end{bwslide}
        !           294: 
        !           295: \begin{bwslide}
        !           296: \ctitle {Applying the Directory \\ Directory Environment}
        !           297: 
        !           298: \begin{nrtc}
        !           299: \item  Large scale networks
        !           300:        \begin{nrtc}
        !           301:        \item   Various objects enter and leave
        !           302:        \item   Connectivity of objects changes
        !           303:        \item   Characteristic of objects change
        !           304:        \end{nrtc}
        !           305: \item  Object interrogation is more frequent than object changes
        !           306: \item  Object identification methods
        !           307:        \begin{nrtc}
        !           308:        \item   Chosen for ease of allocation
        !           309:        \end{nrtc}
        !           310: \end{nrtc}
        !           311: \end{bwslide}
        !           312: 
        !           313: \begin{bwslide}
        !           314: \ctitle {Applying the Directory \\ Directory Service Characteristics}
        !           315: 
        !           316: \begin{nrtc}
        !           317: \item  Isolate user from frequent changes to network
        !           318: \item  Provide ``user friendly'' view of network
        !           319:        \begin{nrtc}
        !           320:        \item   Aliases
        !           321:        \item   ``Yellow Pages''
        !           322:        \end{nrtc}
        !           323: \end{nrtc}
        !           324: \end{bwslide}
        !           325: 
        !           326: \begin{bwslide}
        !           327: \ctitle {Applying the Directory \\ Patterns of Usage}
        !           328: \end{bwslide}
        !           329: 
        !           330: \begin{bwslide}
        !           331: \ctitle {Applying the Directory \\ Look---Up}
        !           332: 
        !           333: \begin{nrtc}
        !           334: \item  DUA Supplies
        !           335:        \begin{nrtc}
        !           336:        \item   Distinguished name of object
        !           337:        \item   Attribute type {\em (Optional)}
        !           338:        \end{nrtc}
        !           339: \item  Directory Returns
        !           340:        \begin{nrtc}
        !           341:        \item   Value(s) requested
        !           342:        \end{nrtc}
        !           343: \item  Additionally
        !           344:        \begin{nrtc}
        !           345:        \item Multiple attribute types may be requested
        !           346:        \end{nrtc}
        !           347: \end{nrtc}
        !           348: \end{bwslide}
        !           349: 
        !           350: \begin{bwslide}
        !           351: \ctitle {Applying the Directory \\ Naming}
        !           352: 
        !           353: \begin{nrtc}
        !           354: \item  Names chosen to maximize predictability by humans
        !           355: \item  Common among all applications using an object
        !           356: \end{nrtc}
        !           357: \end{bwslide}
        !           358: 
        !           359: \begin{bwslide}
        !           360: \ctitle {Applying the Directory \\ Browsing}
        !           361: 
        !           362: \begin{nrtc}
        !           363: \item  Combination of list and search
        !           364: \item  Enables user to ``guess'' object name
        !           365: \end{nrtc}
        !           366: \end{bwslide}
        !           367: 
        !           368: \begin{bwslide}
        !           369: \ctitle {Applying the Directory \\ ``Yellow Pages''}
        !           370: 
        !           371: \begin{nrtc}
        !           372: \item  Matching objects for a specific category\\
        !           373:        (i.e., Business Category = ``Window Washing'')
        !           374: \item  Two Approaches
        !           375:        \begin{nrtc}
        !           376:        \item   Search with filter on attributes
        !           377:        \item   Construct special subtrees
        !           378:        \end{nrtc}
        !           379: \end{nrtc}
        !           380: \end{bwslide}
        !           381: 
        !           382: \begin{bwslide}
        !           383: \ctitle        {Applying the Directory \\ Groups}
        !           384: 
        !           385: \begin{nrtc}
        !           386: \item  Are objects
        !           387: \item  Members are objects
        !           388: \item  Membership changes over time
        !           389: \item  Directory will
        !           390:        \begin{nrtc}
        !           391:        \item   Indicate if object is member of group
        !           392:        \item   List membership of group
        !           393:        \end{nrtc}
        !           394: \item  {\em Group member may be a group}
        !           395: \end{nrtc}
        !           396: \end{bwslide}
        !           397: 
        !           398: \begin{bwslide}
        !           399: \ctitle {Applying the Directory \\ Authentication}
        !           400: 
        !           401: \begin{nrtc}
        !           402: \item  Directory supports applications by storing authentication information
        !           403: \item  Directory may uses authentication information
        !           404: \item  Directory Contains
        !           405:        \begin{nrtc}
        !           406:        \item   Passwords, {\em Simple Authentication} 
        !           407:        \item   Public encryption keys, {\em Strong Authentication}
        !           408:        \end{nrtc}
        !           409: \end{nrtc}
        !           410: \end{bwslide}
        !           411: 
        !           412: \begin{bwslide}
        !           413: \ctitle        {Applying the Directory \\ Generic Directory Applications}
        !           414: 
        !           415: \begin{nrtc}
        !           416: \item  Inter---Personal Communications
        !           417: \item  Inter---System Communications
        !           418: \end{nrtc}
        !           419: \end{bwslide}
        !           420: 
        !           421: \begin{bwslide}
        !           422: \ctitle        {Applying the Directory \\ Inter---Personal Communications Directory}
        !           423: 
        !           424: \begin{nrtc}
        !           425: \item  Provide humans with communication information for others
        !           426: \item  {\em Some} Typical object classes
        !           427:        \begin{nrtc}
        !           428:        \item   Person
        !           429:        \item   Organizational role
        !           430:        \item   Group
        !           431:        \end{nrtc}
        !           432: \item  Typical attributes retrieved
        !           433:        \begin{nrtc}
        !           434:        \item   Electronic mail address
        !           435:        \item   Telephone number
        !           436:        \item   Physical delivery information
        !           437:        \end{nrtc}
        !           438: \end{nrtc}
        !           439: \end{bwslide}
        !           440: 
        !           441: \begin{bwslide}
        !           442: \ctitle {Applying the Directory \\ Inter---System Communications Directory}
        !           443: 
        !           444: \begin{nrtc}
        !           445: \item  OSI Reference Model \emph{Requires} Two Directory Functions
        !           446:        \begin{nrtc}
        !           447:        \item   Application Layer: \\ Application Title to Presentation Address
        !           448:        \item   Network Layer: \\ NSAP Addresses to SNPA Address
        !           449:        \end{nrtc}
        !           450: \item  Typical Object Class
        !           451:        \begin{nrtc}
        !           452:        \item   Application Entity
        !           453:        \end{nrtc}
        !           454: \item  Typical Attribute Retrieved
        !           455:        \begin{nrtc}
        !           456:        \item   Presentation Address
        !           457:        \end{nrtc}
        !           458: \end{nrtc}
        !           459: \end{bwslide}
        !           460: 
        !           461: \begin{bwslide}
        !           462: \ctitle {Directory Service}
        !           463: \begin{nrtc}
        !           464: \item  Provided to user through DUA
        !           465: \item  Responds to requests from DUA
        !           466: \item  Request Types:
        !           467:        \begin{nrtc}
        !           468:        \item   Interrogation
        !           469:        \item   Modification
        !           470:        \end{nrtc}
        !           471: \item  Requests may be qualified
        !           472: \item  Result / Response
        !           473:        \begin{nrtc}
        !           474:        \item   Requests always generate a result
        !           475:        \item   Normal: Form specific to request
        !           476:        \item   Error: Common to other requests
        !           477:        \end{nrtc}
        !           478: \end{nrtc}
        !           479: \end{bwslide}
        !           480: 
        !           481: \begin{bwslide}
        !           482: \ctitle {Directory Service (cont.)}
        !           483: \begin{nrtc}
        !           484: \item  ``Outside'' the Standards
        !           485:        \begin{nrtc}
        !           486:        \item Addition/Deletion of arbitrary entries
        !           487:        \item Management of access Control
        !           488:        \item Management of schema
        !           489:        \item Management of knowledge information
        !           490:        \end{nrtc}
        !           491: \end{nrtc}
        !           492: \end{bwslide}
        !           493: 
        !           494: \begin{bwslide}
        !           495: \ctitle {Directory Service (cont.)}
        !           496: 
        !           497: \begin{nrtc}
        !           498: \item  Connection oriented
        !           499: \item  Peer entity authentication performed at association establishment
        !           500: \end{nrtc}
        !           501: \end{bwslide}
        !           502: 
        !           503: \begin{bwslide}
        !           504: \ctitle {Directory Service --- Service Qualification}
        !           505: Qualifying Requests:
        !           506: \begin{nrtc}
        !           507: \item  Service controls
        !           508: \item  Security parameters
        !           509: \item  Filters
        !           510: \end{nrtc}
        !           511: \end{bwslide}
        !           512: 
        !           513: \begin{bwslide}
        !           514: \ctitle {Directory Service --- Directory Interrogation}
        !           515: Types of requests:
        !           516: \begin{nrtc}
        !           517: \item  Read
        !           518: \item  Compare
        !           519: \item  List
        !           520: \item  Search
        !           521: \item  {\em Abandon}
        !           522: \end{nrtc}
        !           523: \end{bwslide}
        !           524: 
        !           525: \begin{bwslide}
        !           526: \ctitle {Directory Service --- Directory Modification}
        !           527: \begin{nrtc}
        !           528: \item  Add entry
        !           529: \item  Remove entry
        !           530: \item  Modify entry
        !           531: \item  Modify relative distinguished name
        !           532: \end{nrtc}
        !           533: \end{bwslide}
        !           534: 
        !           535: 
        !           536: \begin{bwslide}
        !           537: \ctitle {Directory Service --- Outcomes}
        !           538: Requests may result in:
        !           539: \begin{nrtc}
        !           540: \item  Normal response
        !           541: \item  Errors
        !           542: \item  Referrals
        !           543: \end{nrtc}
        !           544: \end{bwslide}
        !           545: 
        !           546: \begin{bwslide}
        !           547: \ctitle {Directory Protocols}
        !           548: 
        !           549: \begin{nrtc}
        !           550: \item  Directory Access Protocol --- $DAP$ --- $(DUA \longleftrightarrow DSA)$
        !           551: \item  Directory System Protocol --- $DSP$ --- $(DSA \longleftrightarrow DSA)$
        !           552: \end{nrtc}
        !           553: \end{bwslide}
        !           554: 
        !           555: \begin{bwslide}
        !           556: \ctitle        {Directory Protocols}
        !           557: 
        !           558: \vskip .5in
        !           559: \diagram[p]{figure21}
        !           560: \end{bwslide}
        !           561: 
        !           562: \begin{bwslide}
        !           563: \ctitle        {Part II: Quick Summary}
        !           564: 
        !           565: \begin{nrtc}
        !           566: \item  Information Model --- DIB, DIT, Entries
        !           567: \item  Functional Model --- ``The Directory''
        !           568: \item  Organizational Model --- Directory Management Domains
        !           569: \item  Security Model --- Security Policies
        !           570: \item  Applying the Directory --- User approach
        !           571: \item  The Directory Service --- An internal approach
        !           572: \end{nrtc}
        !           573: \end{bwslide}
        !           574: 
        !           575: \begin{bwslide}
        !           576: \ctitle {Part  III: Upper Layer Requirements}
        !           577: 
        !           578: \begin{nrtc}
        !           579: \item  Association Control
        !           580: \item  Remote Operations
        !           581: \item  Session {\em --- Version 2}
        !           582: \item  Transport
        !           583: \end{nrtc}
        !           584: \end{bwslide}
        !           585: 
        !           586: \begin{bwslide}
        !           587: \ctitle        {Lower Layer Requirements}
        !           588: 
        !           589: \begin{nrtc}
        !           590: \item  ISO/IEC - No specific Transport Class requirement
        !           591: \item  CCITT   - Transport Class 0 over X.25
        !           592: \end{nrtc}
        !           593: \end{bwslide}
        !           594: 
        !           595: \begin{bwslide}
        !           596: \ctitle        {Part IV: Reference Points}
        !           597: \end{bwslide}
        !           598: 
        !           599: \begin{bwslide}
        !           600: \ctitle        {Standards \& Status}
        !           601: 
        !           602: \begin{nrtc}
        !           603: \item  ISO/IEC 9594 --- {\em The Directory}
        !           604: \item  CCITT X.500 --- {\em The Directory}
        !           605: \item  CCITT F.500 --- {\em International Public Directory Services}
        !           606: \end{nrtc}
        !           607: \end{bwslide}
        !           608: 
        !           609: \begin{bwslide}
        !           610: \ctitle {Directory\\ References}
        !           611: 
        !           612: \begin{nrtc}
        !           613: \item {The Directory--Overview of concepts, models and service}  (ISO/IEC 9594-1, CCITT Recommendation X.500)
        !           614: \item {The Directory--Models} (ISO/IEC 9594-2, CCITT Recommendation X.501)
        !           615: \item {The Directory--Abstract service definition} (ISO/IEC 9594-3, CCITT Recommendation X.511)
        !           616: \item {The Directory--Procedures for distributed operations} (ISO/IEC 9594-4, CCITT Recommendation X.518)
        !           617: \item {The Directory--Protocol specifications} (ISO/IEC 9594-5, CCITT Recommendation X.519)
        !           618: \item {The Directory--Selected attribute types} (ISO/IEC 9594-6, CCITT Recommendation X.520)
        !           619: \item {The Directory--Selected object classes} (ISO/IEC 9594-7, CCITT Recommendation X.521)
        !           620: \item {The Directory--Authentication framework} (ISO/IEC 9594-8, CCITT Recommendation X.509)
        !           621: \end{nrtc}
        !           622: \end{bwslide}
        !           623: 
        !           624: \begin{bwslide}
        !           625: \ctitle {Remote Operations\\ References}
        !           626: 
        !           627: \begin{nrtc}
        !           628: \item {Remote Operations--Part 1: Model, Notation and Service Definition} (ISO/IEC 9072-1, CCITT Recommendation X.219)
        !           629: \item {Remote Operations--Part 2: Protocol Specification} (ISO/IEC 9072-2, CCITT Recommendation X.229)
        !           630: \end{nrtc}
        !           631: \end{bwslide}
        !           632: 
        !           633: \begin{bwslide}
        !           634: \ctitle {Association Control\\ References}
        !           635: 
        !           636: \begin{nrtc}
        !           637: \item {Association Control--Service Definition} (ISO/IEC 8649-2, CCITT Recommendation X.217)
        !           638: \item {Association Control--Protocol Definition} (ISO/IEC 8650-2, CCITT Recommendation X.217)
        !           639: \end{nrtc}
        !           640: \end{bwslide}
        !           641: 
        !           642: \begin{bwslide}
        !           643: \ctitle        {Implementation Profiles\\ References \& Status}
        !           644: 
        !           645: \begin{nrtc}
        !           646: \item  NIST:  December 1987 {\em (December 1988 to be approved this week)}
        !           647: \item  SPAG:  Status unknown, work being combined with EWOS
        !           648: \item  EWOS:  No stable profile at this time.
        !           649: \end{nrtc}
        !           650: \end{bwslide}
        !           651: 
        !           652: \begin{bwslide}
        !           653: \ctitle        {Demonstrations}
        !           654: 
        !           655: \begin{nrtc}
        !           656: \item  Enterprise Networking Event '88 {\em (ENE)}
        !           657: \item  CeBIT '89 {\em (Hanover Fair)}
        !           658:        \begin{nrtc}
        !           659:        \item EurOSInet / OSITOP
        !           660:        \item MultiNET
        !           661:        \end{nrtc}
        !           662: \end{nrtc}
        !           663: \end{bwslide}
        !           664: 
        !           665: \begin{bwslide}
        !           666: \ctitle {Part V: Conclusions}
        !           667: \end{bwslide}
        !           668: 
        !           669: \begin{bwslide}
        !           670: \ctitle        {Summary}
        !           671: \begin{nrtc}
        !           672: \item  General introduction to Directory --- Names to Addresses
        !           673: \item  Detailed examination of Directory
        !           674: \item  Overview of OSI upper layers
        !           675: \item  Current activities and references
        !           676: \end{nrtc}
        !           677: \end{bwslide}
        !           678: 
        !           679: \begin{bwslide}
        !           680: \ctitle        {Directory}
        !           681: 
        !           682: \begin{nrtc}
        !           683: \item  Simplifies distribution of large networks
        !           684: \item  Allows OSI networks to be self configuring
        !           685: \item  Hides complex underpinings from users
        !           686: \end{nrtc}
        !           687: \end{bwslide}
        !           688: 
        !           689: \end{document}

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