One of the most common AAA protocols that can be used to authenticate login to many types of systems on any OS - associate it with wireless and captive portals for network access; encrypts passwords only
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A type of open standard AAA protocol - not backward compatible with prior version - mainly used for device administration and encrypts entire communication, not just password
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More than a simple user name and PW authentication, this is a protocol for reading and writing directories over a network (like a phonebook) - X.500 standard, port 389
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Organization units (country, state, department, etc) within an X.500 tree
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Individual units (computers, printers, files) within a X.500 tree
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OLD authentication exclusive to Windows OS (win NT + LANMAN), relatively insecure, not recommended
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Modern Windows authentication method - SSO using ticketing for all Windows resources after initial logon - protects against replay and man-in-the-middle attacks
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