CompTIA Security+ Question E-17

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?

A. Kerberos
B. TACACS+
C. Radius
D. LDAP

Answer: A

Explanation:
Kerberos makes use of port 88.