A+ Ports Quiz: TCP or UDP — Do You Know Each One?

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| Questions: 20 | Updated: Jul 2, 2026
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1. TCP uses a sliding window mechanism for flow control.

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About This Quiz
A+ Ports Quiz: TCP Or Udp Do You Know Each One? - Quiz

Test your knowledge of TCP vs UDP Ports (A+) with this college-level quiz. This assessment covers the fundamental differences between TCP and UDP protocols, their port assignments, use cases, and network behavior. Understand when to use each protocol and how they impact data transmission reliability and speed\u2014essential skills for CompTIA... see moreA+ certification. see less

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2. Which protocol would be best for a real-time voice call application?

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3. TCP establishes a connection before transmitting data, while UDP sends data immediately.

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4. Which of the following protocols require TCP? (Select all that apply)

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5. Port 53 is associated with ____ protocol traffic.

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6. Which protocol is used by the Domain Name System for standard queries?

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7. UDP does not perform error checking or retransmission of lost packets.

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8. FTP control connections use port 21 and the ____ protocol.

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9. What is the maximum size of a UDP datagram?

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10. Which of the following uses UDP? (Select all that apply)

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11. Which protocol guarantees in-order delivery of data packets?

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12. SSH traffic typically uses port 22 and the ____ protocol.

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13. Which protocol is preferred for video streaming and online gaming?

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14. UDP is considered a ____ protocol because it sends data without establishing a connection.

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15. What port does SMTP use for email transmission?

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16. TCP requires a three-way handshake before data transmission.

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17. DNS typically uses which protocol for queries?

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18. Which port number is used for HTTPS traffic?

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19. TCP operates at which OSI layer?

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20. What is the primary advantage of UDP over TCP?

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TCP uses a sliding window mechanism for flow control.
Which protocol would be best for a real-time voice call application?
TCP establishes a connection before transmitting data, while UDP sends...
Which of the following protocols require TCP? (Select all that apply)
Port 53 is associated with ____ protocol traffic.
Which protocol is used by the Domain Name System for standard queries?
UDP does not perform error checking or retransmission of lost packets.
FTP control connections use port 21 and the ____ protocol.
What is the maximum size of a UDP datagram?
Which of the following uses UDP? (Select all that apply)
Which protocol guarantees in-order delivery of data packets?
SSH traffic typically uses port 22 and the ____ protocol.
Which protocol is preferred for video streaming and online gaming?
UDP is considered a ____ protocol because it sends data without...
What port does SMTP use for email transmission?
TCP requires a three-way handshake before data transmission.
DNS typically uses which protocol for queries?
Which port number is used for HTTPS traffic?
TCP operates at which OSI layer?
What is the primary advantage of UDP over TCP?
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