JN0-102 · Question #291
Which three protocols use UDP as a transport protocol by default? (Choose three.)
The correct answer is B. TFTP C. DNS D. SNMP. Several application layer protocols rely on UDP for their transport, leveraging its speed and simplicity for services like trivial file transfer, domain name resolution, and network management.
Question
Which three protocols use UDP as a transport protocol by default? (Choose three.)
Options
- AHTTP
- BTFTP
- CDNS
- DSNMP
- ESMTP
How the community answered
(18 responses)- A6% (1)
- B89% (16)
- E6% (1)
Why each option
Several application layer protocols rely on UDP for their transport, leveraging its speed and simplicity for services like trivial file transfer, domain name resolution, and network management.
HTTP (Hypertext Transfer Protocol) primarily uses TCP (port 80 for HTTP, 443 for HTTPS) as its transport protocol to ensure reliable and ordered delivery of web content.
TFTP (Trivial File Transfer Protocol) uses UDP (port 69) as its transport protocol due to its simplicity and stateless nature, making it suitable for transferring small files quickly without the overhead of TCP.
DNS (Domain Name System) primarily uses UDP (port 53) for efficient, connectionless queries, although it switches to TCP for larger responses or zone transfers.
SNMP (Simple Network Management Protocol) utilizes UDP (ports 161 for requests, 162 for traps) for exchanging management information between network devices, prioritizing speed over guaranteed delivery for monitoring tasks.
SMTP (Simple Mail Transfer Protocol) relies on TCP (port 25) for reliable and ordered transmission of email messages between mail servers.
Concept tested: Protocols using UDP for transport
Source: https://learn.microsoft.com/en-us/windows-server/networking/dns/what-is-dns
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