TFTP Message Types
Following table lists five message types in TFTP.
| Messsage Opcode | Message Type | Description |
|---|---|---|
| 1 | RRQ (Read Request) | The TFTP RRQ (Read Request) message type is used by the client to establish a TFTP connection for reading file from the server. |
| 2 | WRQ (Write Request) | The TFTP WRQ (Write Request) message type is used by the client to establish a TFTP connection for writting file to the server. |
| 3 | DATA | The TFTP DATA message is a block of data. |
| 4 | ACK (Acknowledgment) | The TFTP ACK (Acknowledgment) message type is used to acknowledge the receipt of a data block. |
| 5 | ERROR | The TFTP ERROR message type is used to notify a problem during data transmission or when a TFTP connection cannot be established. |