RRQ
E229034
RRQ is the Read Request message type used in the Trivial File Transfer Protocol (TFTP) to initiate the transfer of a file from a server to a client.
All labels observed (1)
| Label | Occurrences |
|---|---|
| RRQ canonical | 2 |
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Read Request
ⓘ
TFTP message type ⓘ |
| abbreviationFor | Read Request ⓘ |
| acknowledgedBy | DATA packet with block number 1 ⓘ |
| binaryFormat | 2-byte opcode followed by filename, 0 byte, mode, 0 byte, and options ⓘ |
| containsField |
filename
ⓘ
mode ⓘ optional TFTP options ⓘ |
| contrastWith | WRQ ⓘ |
| dataFlow | data flows from server to client after RRQ ⓘ |
| defaultServerPort | 69 ⓘ |
| definedIn | RFC 1350 ⓘ |
| direction | client-to-server ⓘ |
| errorHandling | errors reported via TFTP ERROR messages ⓘ |
| filenameEncoding | ASCII ⓘ |
| firstStepIn | TFTP read transfer sequence ⓘ |
| initiatesExchangeWith | DATA messages ⓘ |
| layer | application layer ⓘ |
| modeCaseSensitivity | mode is case-insensitive in TFTP specification ⓘ |
| modeExamples |
mail
ⓘ
netascii ⓘ octet ⓘ |
| networkPortUsage | may cause server to use a new ephemeral UDP port for data transfer ⓘ |
| opcodeValue | 1 ⓘ |
| operatesOver | connectionless transport ⓘ |
| optionNegotiation |
can include TFTP option extensions such as blksize
ⓘ
can include TFTP option extensions such as timeout ⓘ can include TFTP option extensions such as tsize ⓘ |
| packetType | control packet ⓘ |
| purpose | initiate file transfer from server to client ⓘ |
| receivedBy | TFTP server ⓘ |
| reliabilityMechanism | relies on retransmission and timeouts at TFTP level ⓘ |
| requires | server to have read access to requested file ⓘ |
| responseIfAccessViolation | ERROR packet from server ⓘ |
| responseIfFileNotFound | ERROR packet from server ⓘ |
| retransmissionCondition | no response within timeout ⓘ |
| roleInTFTP | request file read operation ⓘ |
| securityCharacteristic | no built-in authentication ⓘ |
| sentBy | TFTP client ⓘ |
| standardStatus | part of TFTP standard ⓘ |
| transportProtocol | UDP ⓘ |
| typicalUseCase |
firmware or configuration download
ⓘ
network device bootstrapping ⓘ |
| usedFor | downloading files from TFTP server ⓘ |
| usedInProtocol |
TFTP
ⓘ
surface form:
Trivial File Transfer Protocol
|
| WRQMeaning | Write Request ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.