Within the TCP/IP suite, which protocol provides very minimal file transfer capability with minimal overhead, suitable for simple bootstrapping and configuration tasks?
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ARARP
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BFTP
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CTFTP
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DTELNET
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ENone of the above
Answer
Correct Answer: TFTP
Explanation
Introduction / Context:Different TCP/IP application protocols trade features for simplicity. When devices need lightweight file transfer for boot images or configuration—often before a full operating system loads—they rely on a minimal protocol rather than a full-featured one like FTP.
Given Data / Assumptions:
- Requirement: minimal capability and low overhead for file transfer.
- Use cases: network booting, firmware/config delivery, small embedded systems.
Concept / Approach:Trivial File Transfer Protocol (TFTP) runs over UDP and supports basic read/write operations without authentication, directory listing, or advanced control. This austerity keeps implementations small and suitable for constrained or pre-boot environments. FTP, by contrast, is richer (authentication, control/data channels) and heavier.
Step-by-Step Solution:
Match “minimal capability + minimal overhead” to TFTP’s design over UDP. Exclude FTP (feature-rich), TELNET (remote terminal), and RARP (legacy address resolution). Conclude TFTP is the intended protocol for lightweight transfers.Verification / Alternative check:PXE boot sequences commonly fetch bootloaders and images via TFTP because of its simplicity and small client footprint, confirming its role as the minimal file transfer option in TCP/IP environments.
Why Other Options Are Wrong:
- RARP: maps MAC to IP; not a file transfer protocol.
- FTP: heavyweight, connection-oriented, with control and data channels.
- TELNET: interactive text terminal; no file transfer semantics.
- None: incorrect because TFTP matches exactly.
Common Pitfalls:Assuming TFTP is secure—by design it lacks authentication and encryption; mistaking TFTP’s UDP simplicity as universally suitable (it is best for controlled LANs and bootstrapping, not general Internet file exchange).
Final Answer:TFTP