LDAP

Technology & Computing abbreviation · Networking

LDAP
Stands forLightweight Directory Access Protocol
CategoriesTechnology & Computing

LDAP stands for Lightweight Directory Access Protocol, a networking abbreviation.

An open protocol for querying and updating directory services that store users, groups, computers and their attributes. Applications use LDAP to look up accounts and verify passwords against a central directory such as Active Directory or OpenLDAP.

Example: The wiki authenticates staff against LDAP, so everyone logs in with their network password.

Usage notes

Developed in the early 1990s at the University of Michigan as a lighter alternative to the X.500 Directory Access Protocol; LDAPv3 is defined in RFC 4511 (2006). Entries are identified by distinguished names such as cn=Ana Ruiz,ou=Sales,dc=example,dc=com. Plain LDAP on port 389 is unencrypted, so LDAPS on port 636 or StartTLS should be used.

More networking abbreviations

  • IS-IS – Intermediate System to Intermediate System
  • iSCSI – Internet Small Computer Systems Interface
  • ISP – Internet service provider
  • IXP – Internet exchange point
  • L2TP – Layer 2 Tunneling Protocol
  • LAN – Local area network
  • MAC – Media access control (address)
  • MAN – Metropolitan area network
  • MPLS – Multiprotocol Label Switching
  • MQTT – MQTT (formerly MQ Telemetry Transport)
  • MSS – Maximum segment size
  • MTA – Mail transfer agent

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