正解:B,D
Explanation/Reference:
Explanation:
The router uses two types of authentication:
* Simple password authentication (also called plain text authentication)-Supported by Integrated System- Integrated System (IS-IS), Open Shortest Path First (OSPF), and Routing Information Protocol Version 2 (RIPv2)
* MD5 authentication-Supported by OSPF, RIPv2, BGP, and EIGRP
If the service password-encryption command is not used when implementing EIGRP authentication, the key-string will be stored as plain text in the router configuration. If you configure the service password- encryption command, the key-string will be stored and displayed in an encrypted form; when it is displayed, there will be an encryption-type of 7 specified before the encrypted key-string.
EIGRP originally only supported MD5 authentication but since IOS 15.1(2)S and 15.2(1)T we can also use SHA-256 authentication. Nowadays, this form of authentication is far more secure than MD5.
They ask for 2 options. The one that we know MD5 and the must lose to the reality is plain text. However I didn´t find and official article that mentioned plain Text.
The router uses two types of authentication:
* Simple password authentication (also called plain text authentication)-Supported by Integrated System- Integrated System (IS-IS), Open Shortest Path First (OSPF), and Routing Information Protocol Version 2 (RIPv2)
* MD5 authentication-Supported by OSPF, RIPv2, BGP, and EIGRP
Plaint text is NOT supported in EIGRP.
In EIGRP supported only MD5 and SHA but this is the more acceptable choice