NTLM
LDAP (Lightweight Directory Access Protocol ) is a protocol that is used for authentication in domain
Kerberos
It depends. For robust and high risk system, Lightweight Directory Access Protocol (LDAP) authentication, or client-side public key infrastructure authentication.
http://technet.microsoft.com/en-us/library/bb727067.aspx
false
kerberos version 5 NTLM protocols are used by AD
XTACACS
lightweight directory access protocol
LDAP (Lightweight Directory Access Protocol)
there may be the issue with the layer 2 protocol like hdlc or ppp is not configured or wrongly configured if the interface is serial interface.
Active Directory is the name Microsoft uses for LDAP protocol X.500 (Lightweight Directory Access Protocol).
snmp