LDAP (Lightweight Directory Access Protocol)

A subset of X.500 that can run over TCP/IP net-

works, LDAP was developed to simplify the demands of the X.500 DAP. Described in the IETF RFCs 1777, LDAP can run as a standalone directory system or can be used as a means of accessing an X.500

directory or other directory. LDAPv3 (RFC 3377) supports non-ASCII and non-English characters for international directories, and can sort through multiple directories on the basis of a single request. See also X.500.

• header error control (HEC)
• header suppression
• headroom
• Hearing Carry Over (HCO)
• heavy carrier
• heavy metal
• HEC (Header Error Control)
• Hellenologophobia
• henry (H)
• Hertz, Heinrich Rudolf (1857–1894)
• Hertz (Hz)
• Hexadecimal
• hexadecimal notation (hex)
• hexadecimal notation (hex)
• hex (hexadecimal notation)
• HFC (Hybrid Fiber/Coax)
• HF (High Frequency)
• HF (High Frequency)
• high bit-rate digital subscriber line (HDSL)
• high capacity voice (HCV)
• high-cost area
• high definition television (HDTV)
• high density bipolar order 3 (HDB3)
• high frequency (HF)
• High-Level Data Link Control (HDLC)