The Use of TFTP Servers

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File Transfer Protocol (FTP) described in RFC 1350 is called Trivial File Transfer Protocol (TFTP) or Trivial FTP. Because of its ease of use, speed, and other advantages—especially if you want to use it at home or within your company network—the TFTP server is a perfect alternative to other options like FTP.

Smaller files can be transferred from one machine to another using a TFTP server, which uses the User Datagram Protocol (UDP). A TFTP can also be used for other things, such as backing up networks and starting your computer without a disc. Most gadgets, including routers, smartphones, and other electronic devices, use TFTP servers.

However, this protocol doesn’t have any built-in security measures. Therefore authentication is not necessary. It is also primarily utilized in internal networks for this reason. Additionally, by checking the signatures of your transferred data with well-known keys or values, you can make up for any security shortcomings. When your system’s CPU or memory capacity precludes the usage of other protocols like FTP, TFTP is the best option.


TCP can transmit files from one system to another or from one host to another via FTP. Ports 20 and 21 are used for this purpose. When transferring files across multiple systems or hosts, you may meet challenges such as security or a unique file directory or name.

Comparison between FTP and TFTP

TFTP Server FTP Server
TFTP enables data transfer between a server and a client without needing FTP FTP is more complicated than TFTP
TFTP employs only five commands FTP comprises numerous messages or commands
TFTP is quicker FTP can be slower
TFTP does not require authentication for communication establishment FTP requires authentication for communication establishment
TFTP can be used to transfer configurations between network devices FTP is ideal for downloading and uploading files by remote users

How does the TFTP Server Function?

Since the TFTP server uses port 69 to create a UDP connection, you must open a server socket on the server’s IP address over UDP port 69. After establishing the connection, the client will send the request to your server. These message requests might be sent in many formats. The TFTP server will then break this message into chunks of 512 bytes each. Additionally, the final block of each file is fewer than 512 bytes. It is done to assist the receiver in interpreting the final block of the message.

TFTP Server Functionality

TFTP Server Functionality

In addition, each block must be transmitted as a TFTP data request, while the remainder will be assigned a TFTP number. However, you must ensure that each block remains distinct within a UDP transmission. If the previous block’s size is not less than 512 bytes (unless the number is a multiple of 512), the user transmits a block with zero bytes. This will notify the recipient that the data transmission has been completed. In addition, the TFTP server will initiate the checking and pausing protocol and transfer each block individually. This protocol will also demand an acknowledgment from the sender before sending the subsequent blocks. Nonetheless, if the acknowledgment is not received within a specified time frame, the sender will resend the message until it is acknowledged.

Uses of TFTP Servers

Device Bootstrap

A device bootstrap process uses TFTP servers to enable the downloading of configuration files and operating systems. It is possible to copy configuration files between two nodes on the same network. Additionally, devices that acquire an IP address using the Bootstrap Protocol (BOOTP) or Dynamic Host Configuration Protocol (DHCP) can use this TFTP protocol to download configuration files and bootstrap images with ease. In addition, you can use TFTP and FTP for distinct reasons, such as FTP for system image loading and TFTP for boot image loading.

Small File Transfers

UDP enables the transfer of more minor data over a LAN network. It is simpler and requires fewer network resources to distribute firmware updates and files to network devices. Even network resources can be conserved by quickly updating firmware and devices.

Network Administration In bigger intranets, TFTP is commonly utilized for network administration. Since it does not require authentication and is vulnerable to assaults, businesses use it internally to transfer data, transmit updates, etc. Thus, only their internal staff and members may utilize the services while the services remain secure from the public internet.

Home Setting

Residences necessitate lesser data exchanges or the delivery of updates and files. Consequently, TFTP is ideal for household environments. It will help you maintain the security of your data by minimizing its exposure and attack surface. You can utilize a TFTP client and server if you need to transfer huge files between incompatible operating systems.

Why are TFTP Servers Used?

TFTP servers are simple for network managers and engineers to utilize. It assists users in connecting to your network’s resources, resolving issues, managing them, backing them up, and updating them on schedule. Moreover, replacing the hardware and uploading the settings is simple, even if something fails.

Saves Time

Using TFTP servers, you may deploy firmware updates directly to multiple devices from a central place. This suggests that you do not need to spend hours performing a single activity; instead, you may automate the entire process with a TFTP server.


TFTP servers are comparatively faster than FTP servers. You can connect to your network resources more quickly and execute tasks such as updating and file transfer with increased velocity. This increases the efficiency of your engineers and administrators.


Overall, TFTP servers are incredibly useful for a variety of purposes. From simplifying updates to conserving network resources, TFTP servers provide many benefits. When choosing a file transfer protocol for your business, consider all your options and carefully weigh the pros and cons. In many cases, TFTP will be the best option for smaller businesses or those with limited resources.

Check out the top 5 FTP servers for windows.

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