http://technet.microsoft.com/en-us/library/bb742516.aspx
false
LDAP (Lightweight Directory Access Protocol ) is a protocol that is used for authentication in domain
XTACACS
authentication
Chap
Kerberos
Challange Handshake Authentication Protocol
HDLC
Kerberos
yer momma
http://en.wikipedia.org/wiki/Kerberos_(protocol) Why ask a question when you can more easily and quickly read the answer on wikipedia? This is true for a large majority of questions that start with "What is"
L2TP is a tunneling protocol for an IP network. L2 data is transmitted over the network but has no encryption or authentication abilities. This type of protocol is usually paired with IPSec to provide encryption and authentication.