An information bank has been established to store contacts, phone numbers and other records. A UNIX application needs to connect to the index server using port 389. Which of the following…

The correct answer is D. LDAP. LDAP (Lightweight Directory Access Protocol) uses port 389 by default (port 636 for LDAPS, the encrypted version). LDAP is specifically designed for accessing and managing directory information services - such as contacts, phone numbers, user accounts, and organizational…

General security concepts

Question

An information bank has been established to store contacts, phone numbers and other records. A UNIX application needs to connect to the index server using port 389. Which of the following authentication services should be used on this port by default?

Options

ARADIUS
BKerberos
CTACACS+
DLDAP

How the community answered

(37 responses)

A
3% (1)
B
5% (2)
C
3% (1)
D
89% (33)

Explanation

LDAP (Lightweight Directory Access Protocol) uses port 389 by default (port 636 for LDAPS, the encrypted version). LDAP is specifically designed for accessing and managing directory information services - such as contacts, phone numbers, user accounts, and organizational records - making it the natural choice for this 'information bank' or index server scenario. RADIUS (Option A) uses UDP ports 1812/1813 and is primarily used for network access authentication (VPNs, wireless). Kerberos (Option B) uses port 88 and is a ticket-based authentication protocol. TACACS+ (Option C) uses TCP port 49 and is commonly used for device administration authentication in Cisco environments.

Topics

#LDAP#port 389#directory services#authentication protocols

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