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1. 1 - Authentication

   • Three-Party Authentication Model
     • Supplicant / End-Client
       • Authenticator
         • Authentication Server
   • Who You Are Username, Password, Certificate etc.

2. 2 - Authorization

   • Defines what you are allowed to do For device administration • Privilege-level • Allowed commands For network access • VLAN • Access-list • Security Group Tag • Encryption • VPN split-tunneling policy
   • Provides evidence of what you have done, like auditing

3. 3 - Accounting

   • Provides evidence of what you have done, like auditingdddd