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

Explanation:
Kerberos makes use of port 88.
Incorrect Answers:
B: TACACS makes use of TCP port 49 by default.
C: RADIUS makes use of various UDP ports.
D: LDAP makes use of port 389.

http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers