A network technician has just installed a TFTP server on the administrative segment of the network
to store router and switch configurations. After a transfer attempt to the server is made, the process
errors out. Which of the following is a cause of the error?

A.
Only FTP can be used to copy configurations from switches

B.
Anonymous users were not used to log into the TFTP server

C.
An incorrect password was used and the account is now locked

D.
Port 69 is blocked on a router between the network segments