They should be NULL terminated ASCII strings, with full path information if necessary. TFTP file names should be in the format of the target file system. This is discussed in later sections of this guide. If FileX is not available, the user may port the portions of FileX used to their own environment. The TFTP Server is also designed for use with the FileX embedded file system. First, it requires complete access to the UDP well known port 69 for handling all client TFTP requests. The TFTP Server portion of the NetX Duo TFTP package has several additional requirements. The Client portion of the NetX Duo TFTP package has no further requirements. In addition, UDP must be enabled on that same IP instance. In order to function properly, the TFTP Clients portion of the NetX Duo TFTP package requires that an IP instance has already been created. The TFTP package enables hosts to use the TFTP protocol over IP networks. Although this is simple, it does limit the overall TFTP throughput. After a TFTP data packet is sent, the sender waits for an ACK to be returned by the recipient. Unlike more robust protocols, TFTP does not perform extensive error checking and can also have limited performance because it is a stop-and-wait protocol. The Trivial File Transfer Protocol (TFTP) is a lightweight protocol designed for file transfers.

Lightweight tftp server