Trivial File Transfer Protocol
Trivial File Transfer Protocol is a lightweight UDP-based file-transfer protocol that provides basic acknowledgment-based reliability without authentication or encryption.
Acing the CCNA Exam: Volume 2 Advanced Networking and Security
Trivial File Transfer Protocol is a lightweight application-layer protocol for transferring files, typically without authentication or encryption.
- How it is used
- Transfers small files in controlled environments, especially IOS images between file servers and Cisco routers or switches.
- How deep it goes
- Explains requests, UDP port 69, lock-step blocks, acknowledgments, retransmissions, IOS file systems, and transfer commands.
- Examples
- Demonstrates IOS-image copying with copy tftp: flash:, then verifies storage with show flash: and inspects file systems with show file systems.
- What you can do after
- Operate TFTP through Cisco IOS copy, show file systems, dir, more, and show flash: commands.
Acing the CCNA Exam: Volume 1 Fundamentals and Protocols
Trivial File Transfer Protocol is a simple file-transfer protocol that provides its own acknowledgment-based reliability while using UDP.
- How it is used
- Uses UDP for file transfer when application-layer acknowledgments provide reliability.
- How deep it goes
- Explains the acknowledgment mechanism and UDP rationale, but defers fuller TFTP coverage.
- Examples
- Uses an accounting subnet, UDP destination port 69, and a Cisco numbered ACL as operational examples.
- What you can do after
- Operate/configure TFTP filtering by matching UDP destination port 69 in an inbound extended ACL.
Related concepts
- UDPuses · UDP (User Datagram Protocol) is a connectionless transport-layer protocol that sends datagrams without guaranteeing delivery, ordering, or duplicate suppression.
- lock-step communicationuses · Lock-step communication is a sequential exchange in which each message is followed by a wait for the corresponding reply before the next message is sent.
- FTPcontrasts with · FTP is an application-layer network protocol for transferring files between networked systems, typically using separate control and data connections.
- encryptioncontrasts with · Encryption is the cryptographic transformation of readable data into ciphertext to conceal its contents, reversible through decryption with appropriate information.
- client-server architectureuses · A distributed computing pattern in which clients request services or resources from servers, which process the requests and provide results.
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