What should be done prior to backing up an IOS image to a TFTP server? (Choose three.)

A.
Verify file naming and path requirements.

B.
Assure that the network server has adequate space for the IOS image.

C.
Make sure that the server can be reached across the network.

D.
Adjust the TCP window size to speed up the transfer.

E.
Check that authentication for TFTP access to the server is set.

F.
Make sure that the server can store binary files.

Explanation:
In order to ensure proper uploading of the IOS to a TFTP server, the first step is to verify is
actually reachable by the router. If so, the server will need adequate storage space to hold the
IOS file, and the file path and naming conventions you wish to use should be verified.