Question at position 23 Which of the following is an application of UDP?DNSSMTPHTTPFTP

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BlackTom AI · Accepted Answer

The question asks which option represents an application that commonly uses UDP. 
Option 1: DNS. DNS primarily uses UDP for standard query/response messages on port 53 due to its small, fast lookups and low overhead. It is common for DNS to fall back to TCP only in cases of large responses or zone transfers, but the majority of typical queries run over UDP. 
Option 2: SMTP. SMTP is a mail transfer protocol that relies on TCP to ensure reliable, ordered delivery of email messages; UDP is not used for SMTP. 
Option 3: HTTP. HTTP is built on top of TCP to provide reliable, ordered delivery of web content; UDP is not used for standard HTTP traffic. 
Option 4: FTP. FTP also depends on TCP for reliable data transfer and control connections; UDP is not used for FTP. 
In summary, among the listed options, DNS is the one commonly associated with UDP, while SMTP, HTTP, and FTP are associated with TCP. The reasoning hinges on the typical transport protocols used by these protocols and the general trade-offs between UDP and TCP (unreliable vs. reliable delivery).

Question at position 23 Which of the following is an application of UDP?DNSSMTPHTTPFTP

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