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Lesson 8 – EXPLORING DIRECTORY SERVICES OVERVIEW Directory services Specific directory services DIRECTORY SERVICES Network Services: File storage and sharing Printer sharing E-mail Web hosting (Internet/intranet) Database servers Specific application servers

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overview
OVERVIEW
  • Directory services
  • Specific directory services
directory services
DIRECTORY SERVICES

Network Services:

  • File storage and sharing
  • Printer sharing
  • E-mail
  • Web hosting (Internet/intranet)
  • Database servers
  • Specific application servers
  • Internet connectivity
directory services4
Directory services

Networks Services:

  • Dial-in/dial-out
  • Fax
  • Domain Name Service (DNS)
  • Windows Internet Name Service (WINS)
  • Dynamic Host Configuration Protocol (DHCP)
  • Centralized virus-detection
  • Backup and restore
forests trees roots and leaves6
Forests, trees, roots, and leaves

A typical directory tree

providing redundancy
Providing redundancy
  • Directory services must be protected with some redundancy.
  • Redundancy can be provided with duplicate copies of the directory on multiple servers.
providing redundancy8
Providing redundancy

Models:

  • Primary/backup (master/slave)
  • Multimaster
providing redundancy9
Providing redundancy

Primary/backup model:

  • Single primary database contains primary directory on one server.
  • Other servers hold one or more backup copies.
providing redundancy10
Providing redundancy

Multimaster model:

  • Multiple directory servers exist.
  • A directory server can participate in the work of the directory service.
specific directory services
SPECIFIC DIRECTORY SERVICES
  • Novell Directory Services (NDS)
  • Microsoft’s Windows NT domain
  • Microsoft’s Active Directory
  • X.500 Directory Access Protocol (DAP)
  • Lightweight Directory Access Protocol (LDAP)
novell directory services nds
Novell Directory Services (NDS)
  • Reliable
  • Robust
  • Primary/backup approach
  • Compatible with several systems
microsoft s windows nt domain
Microsoft’s Windows NT domain
  • Divides an organization into domains.
  • Domains are geographically organized.
  • A Primary Domain Controller (PDC) controls a domain.
  • One or more Backup Domain Controllers (BDC) are promoted if PDC fails.
microsoft s windows nt domain14
Microsoft’s Windows NT domain

Domain models:

  • Single domain
  • Master domain
  • Multiple master domain
  • Complete trust
microsoft s active directory
Microsoft’s Active Directory
  • Helps to manage large Networks.
  • Uses a peer approach.
  • Is compatible with LDAP (version 2 and 3) and the DNS used on the Internet.
  • Separate organization units are allowed within a domain.
x 500 directory access protocol dap
X.500 Directory Access Protocol (DAP)
  • Defines an Internet directory service.
  • Is too complex to implement due to its broad applicability.
lightweight directory access protocol ldap
Lightweight Directory Access Protocol (LDAP)
  • Runs over TCP/IP.
  • Uses a client/server model.
  • Is predominantly covered by RFC 1777 (version 2) and RFC 2251 (version 3).
  • Describes the layout, fields, and methods to be used.
lightweight directory access protocol ldap18
Lightweight Directory Access Protocol (LDAP)

Basic models:

  • Information model
  • Naming model
  • Functional model
  • Security model
summary
SUMMARY

Directory service:

  • Network services
  • Forests, trees, roots, and leaves
  • Providing redundancy
summary21
Summary

Specific Directories:

  • Novell Directory Services (NDS)
  • Microsoft’s Windows NT domain
  • Microsoft’s Active Directory
  • X.500 Directory Access Protocol (DAP)
  • Lightweight Directory Access Protocol (LDAP)