Multiple choice

When would DNS use TCP?

  1. When DNS querys keep failing

  2. When conducting zone transfer

  3. Upon inital DNS connection request

  4. DNS cannot use TCP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DNS primarily uses UDP for queries. However, it switches to TCP for zone transfers (between servers) or when the response size exceeds the 512-byte UDP limit.

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