SY0-301 · Question #731
An information bank has been established to store contacts, phone numbers and other records. An application running on UNIX would like to connect to this index server using port 88. Which of the follo
The correct answer is A. Kerberos. Kerberos is the authentication protocol that operates on port 88 by default, used for authenticating clients to services in a network environment including UNIX systems.
Question
An information bank has been established to store contacts, phone numbers and other records. An application running on UNIX would like to connect to this index server using port 88. Which of the following authentication services would this use this port by default?
Options
- AKerberos
- BTACACS+
- CRadius
- DLDAP
How the community answered
(15 responses)- A93% (14)
- C7% (1)
Why each option
Kerberos is the authentication protocol that operates on port 88 by default, used for authenticating clients to services in a network environment including UNIX systems.
Kerberos is a ticket-based authentication protocol that uses port 88 by default for both TCP and UDP. It is commonly used on UNIX and Windows systems to authenticate users to network services, including directory and index servers, making it the correct answer here.
TACACS+ uses TCP port 49 by default, not port 88.
RADIUS uses UDP ports 1812 (authentication) and 1813 (accounting) by default, not port 88.
LDAP uses TCP/UDP port 389 (or 636 for LDAPS), not port 88.
Concept tested: Kerberos default port number
Source: https://learn.microsoft.com/en-us/windows-server/security/kerberos/kerberos-authentication-overview
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