You have just issued the command user@router# save current.conf.Assuming the default settings, where in the file system is current.conf saved?（）

单项选择题You configured an interface with an IP address and committed the change. You then committed a change that added an exception in a firewall filter to allow this network through the filter. You realize that this work was done on the wrong router. How do you undo all these changes?（）

A. rollback 2
B. rollback 1
C. rollback 0
D. rollback 3

多项选择题Which two statements are true when using the configure exclusive CLI command?（）

A. Multiple users can enter configuration mode and have their own private configuration.
B. When a user commits, only the user's changes are committed.
C. A message indicates which other users are in configuration mode and what portion of the configuration they are editing.
D. Only a single user can edit the configuration.

多项选择题Which two statements apply when a user has entered private configuration mode by typing configure private?（）

A. All users have their own active configuration.
B. All users have their own private candidate configuration.
C. When a user commits, all nonconflicting changes made by all users are committed.
D. When a user commits, only the user's own changes are committed.

单项选择题Which CLI keyboard sequence allows you to move the cursor to the beginning of the line?（）

A. Ctrl+e
B. Ctrl+p
C. Ctrl+w
D. Ctrl+a

多项选择题You are at the top of the hierarchy and must configure OSPF on interface so-0 0 0 unit 100. Which two achieve this result?（）

A. set protocols   setospf area 0   set interface so-0/0/0.100
B. set protocols ospf area 0 interface so-0/0/0.100
C. edit protocols ospf interface so-0/0/0.100
D. edit protocols ospf area 0   set interface so-0/0/0.100