A system administrator is using a packet sniffer to troubleshoot remote authentication. The administrator detects a device trying to communicate to TCP port 49.
Which of the following authentication methods is MOST likely being attempted?
A.
RADIUS
B.
TACACS+
C.
Kerberos
D.
LDAP
Explanation:
TACACS makes use of TCP port 49 by default.
Incorrect Answers:
A: RADIUS makes use of UDP only.
C, D: Kerberos and LDAP do not make use of TCP port 49.http://en.wikipedia.org/wiki/TACACS
http://en.wikipedia.org/wiki/RADIUS
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers