440 Chapter A: Answers to the "Do I Know This Already?" Quizzes and Q&A Sections
22
What differentiates PAT from NAT:
PAT changes the port address; NAT does not.
Answers to the Chapter 12 "Do I Know This Already?"
Quiz
1
For what does AAA stand?
It stands for authentication, authorization, and accounting.
2
What is authentication?
Authentication provides a method of identifying users. During the authentication process,
the user login (name) and password are checked against the AAA database.
3
What is the difference between character mode and packet mode?
Character mode sends keystrokes to the router through the TTY, vty, AUX, and CON ports
for configuration or query commands. Packet mode uses interface mode or a link protocol
session to communicate with a device other than the router. These defined interfaces
would be the async, group-async, BRI, PRI, serial, dialer profiles, and dialer rotaries.
4
What communication method--packet or character--is used on the console port of a
router?
Character mode sends keystrokes to the router through the TTY, vty, AUX and CON ports
for configuration or query commands.
5
What are the five authentication modes on a router?
Login, enable, Apple Remote Access Protocol (ARAP), PPP, and Netware Asynchronous
Services Interface (NASI) are the five modes.
6
What authentication method is used on an interface without an AAA-defined method?
The default method is used. If no default method has been specified, no authentication can
take place.
7
What is the command to enable AAA using Remote Authentication Dial-In User Service
(RADIUS)?
aaa new-model
radius-server host radius-ip-address
radius-server key password