210-250 · Question #48
According to RFC 1035 which transport protocol is recommended for use with DNS queries?
The correct answer is D. User Datagram Protocol. RFC 1035 specifies that DNS queries should use UDP on port 53 as the primary transport protocol due to its low overhead.
Question
According to RFC 1035 which transport protocol is recommended for use with DNS queries?
Options
- ATransmission Control Protocol
- BReliable Data Protocol
- CHypertext Transfer Protocol
- DUser Datagram Protocol
How the community answered
(47 responses)- B6% (3)
- C4% (2)
- D89% (42)
Why each option
RFC 1035 specifies that DNS queries should use UDP on port 53 as the primary transport protocol due to its low overhead.
TCP is used for DNS zone transfers and large responses, not standard queries as defined in RFC 1035.
Reliable Data Protocol is not used for DNS resolution and is not referenced in RFC 1035.
HTTP is not the transport protocol for DNS in RFC 1035; DNS over HTTPS (DoH) is a much later standard defined in RFC 8484.
RFC 1035 recommends UDP for DNS queries because it is connectionless and low-latency, which suits the small, fast request-response nature of standard DNS lookups. TCP is reserved for cases where a response exceeds 512 bytes or for zone transfers, but UDP is the protocol of record for typical queries per the RFC.
Concept tested: DNS transport protocol per RFC 1035
Source: https://www.rfc-editor.org/rfc/rfc1035
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