TFTP client command-line syntax:

TFTP.exe [-i] [-b blocksize] [-v] [-t timeout] [-s] host [GET | PUT] source [destination]

-i	 Specifies binary image transfer mode (also called octet). In binary image mode the file is moved literally, byte by byte. Use this mode when transferring binary files.
-b	 Blocksize used during the transfer (512 bytes by default). Can take on a value between 8 and 65464 bytes.
-v	 Show detail information during transfer (verbose mode).
-t	 Timeout value in seconds (10 seconds by default). Can take on a value between 1 and 255 seconds.
-s	 Do not use tsize option (which is enabled by default).
host	Specifies the local or remote host.
GET	Transfers the file destination on the remote host to the file source on the local host.
PUT	Transfers the file source on the local host to the file destination on the remote host.
source	Specifies the file to transfer.
destination  	Specifies where to transfer the file.