1:
| What does AAA stand for, and what is its function? |
A1:
| Answer: AAA stands for authentication, authorization, and accounting and provides security to Cisco IOS routers and network devices. |
2:
| What is authentication used for? |
A2:
| Answer: By requiring the user's username and password, authentication enables administrators to identify who can connect to a router. |
3:
| What is authorization used for? |
A3:
| Answer: Authorization allows administrators to control the level of access users have after they have successfully gained access to a device. |
4:
| What is accounting used for? |
A4:
| Answer: Accounting allows administrators to collect information about users. More specifically, administrators can track which user logged in to which router, which Cisco IOS commands a user issued, and how many bytes were transferred during a user's session. |
5:
| What are the three types of authentication servers supported by Cisco IOS? |
A5:
| Answer: The three types of authentication servers supported by Cisco IOS are TACACS+, RADIUS, and Kerberos. |
6:
| List three characteristics of the TACACS+ protocol. |
A6:
| Answer: Three characteristics of the TACACS+ protocol are as follows:- Packets sent between client/server are TCP.
- TCP port is 49.
- There is packet encryption.
|
7:
| List three characteristics of the RADIUS protocol. |
A7:
| Answer: Three characteristics of the RADIUS protocol are as follows:- Packets sent between client/server are UDP.
- UDP port is 1812.
- There is password encryption.
|
8:
| What Cisco IOS command is used to enable AAA on a router? |
A8:
| Answer: The Cisco IOS command to enable AAA on a Cisco IOS device is aaa new-model . |
9:
| What is the Cisco IOS lock-and-key feature? |
A9:
| Answer: The lock-and-key feature uses dynamic access lists to create specific, temporary openings in the network in response to a user's successful authentication. |
10:
| Give an example of two-factor identification.A10:
| Answer: One example of two-factor identification is as follows: When retrieving money from an account at an ATM, a customer needs both a PIN number and the magnetic-strip card. |
لطفا منتظر باشید ...
