单选题Which user authenticaton method is supported by the Junos OS as the last resort alternative?（）A TACACS+B RADIUSC local user databaseD enable password

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The database instance has the following parameter setting： OS_AUTHENT_PREFIX = OPS$ OS_ROLES = FALSE  REMOTE_OS_AUTHENT = FALSE REMOTE_OS_ROLES = FALSE TIMED_OS_STATISTICS = 0  You have a local operating system user SKD. You create a database user OPS$SKD， and then  assignexternal authentication. The user OPS$SKD has the CREATE SESSION privilege.  What would youachieve by the above process（）

• A、The database user OPS$SKD will be able to administer the database.
• B、The authentication detail for the database user OPS$SKD is recorded in the password file.
• C、The local operating system user SKD will be able to access the database instance without specifying the username and password.
• D、The database user OPS$SKD has to login with the password of the local operating system user SKD to access the database instance.

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Which one of the following commands can be used to enable AAA authentication to determine if a user canaccess the privilege command level？（）

• A、aaa authentication enable method default
• B、aaa authentication enable default
• C、aaa authentication enable level
• D、aaa authentication enable default local

第10题：

Which of the following is the MOST secure method to authenticate users?（）

• A、User ID, a strong password, and a fingerprint scanner
• B、User ID, a strong password, and a token based device
• C、User ID and two levels of strong password requirements
• D、User ID, a strong password, and a smart card