Authentication Methods 4.1

Question 1

Termina Access Control access Control System Plus (TACACS+

Answer 1

1993 Cisco proprietary

AAA
Authentication
authorization
Accounting
Uses TCP 49

Client-Server model

Encrypts the entire process

Question 2

Remote Authentication Dial-In User Service

Answer 2

Standard source

UDP port 1812 authentication and authorization

UDP port 1813 for accounting

Encrypts only the password

Standard based protocol

More robust that tacacs+

Question 3

LDAP

Answer 3

Standards for storage and access of user account information

unsecured port 389

secure port 636

Question 4

Kerberos

Answer 4

Mutual Authentication bw server/client

Trusted third party KDC hands out tickets that are used instead of username and password combo

9 steps

Question 5

802.1x

Answer 5

Can be used for LAN port security

Username and password

supplicant seeking network admission

Usually an authentication server RADIUS