When upgrading the IOS image, the network administrator receives the exhibited error message.
What could be the cause of this error?

A.
The new IOS image is too large for the router flash memory.

B.
The new IOS image is not correct for this router platform.

C.
The TFTP server is unreachable from the router.

D.
The IOS image on the TFTP server is corrupt.

E.
There is not enough disk space on the TFTP server for the IOS image.

Explanation:
The problem shown here is that the destination file is not reachable. When copying files via TFTP
the first step is to ensure that there is connectivity to the TFTP server. You should perform the
following steps:
1. Verify that the TFTP server has IP connectivity to the router.
2. Check the IP addresses of the TFTP server and the router or access server targeted for the
TFTP software upgrade.
3. Ping the router or access server to verify that a network connection exists between them.