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Exam N10-007 topic 1 question 123 discussion

Actual exam question from CompTIA's N10-007
Question #: 123
Topic #: 1
[All N10-007 Questions]

Which of the following protocols can be both connection-oriented and connectionless?

  • A. 20 FTP
  • B. 53 DNS
  • C. 67 DHCP
  • D. 80 HTTP
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Suggested Answer: B 🗳️
by Takoyaki at Nov. 14, 2020, 8:19 p.m.

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Takoyaki
Highly Voted 4 years, 9 months ago
DNS is the most correct answer, using both TCP and UDP ports 53 natively. FTP uses TCP port 20 and 21. DHCP uses UDP ports 67 and 68. HTTP uses TCP port 80, but can also use UDP if adapted to do so. DNS remains the most correct answer because HTTP must be adapted to support UDP, while DNS has always supported both.
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