2.1 Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes.
Objective 2.1 sits in Networking, which carries 23% of the A+ Core 1 exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.
Objective title verbatim from the official objectives. CompTIA exam page ↗
A worked example
Shown solved, with the whole explanation open: this is what every question here carries.
Which statement correctly describes the User Datagram Protocol (UDP) as defined for host-to-host communication?
The concept
UDP is described as a transaction-oriented protocol that does not guarantee delivery or protect against duplicate datagrams, unlike TCP.
Why this answer
UDP is explicitly transaction oriented and does not provide guaranteed delivery, matching option B directly.
- AThis describes reliable, ordered delivery, which is a TCP characteristic, not UDP.
- Correct: UDP is transaction oriented and does not guarantee delivery or duplicate protection.
- CUDP has no connection establishment step; this describes TCP's connection-oriented behavior.
- DUDP has no acknowledgment mechanism for individual datagrams; that behavior belongs to TCP.
Now you: objective 2.1 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
A developer is building a live audio chat application that needs low latency and can tolerate occasional lost packets. Which protocol fits this application's needs?
Sample question 2 of 3
A file transfer utility must ensure every byte arrives in the same order it was sent, even across an unreliable network path. Which protocol satisfies this requirement based on its design?
Sample question 3 of 3
A security analyst captures a UDP datagram whose Checksum field is transmitted as all ones. What does this value indicate about the checksum?
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Continue practicingRead the sources
These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.
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- 2.4 2.4 Explain common network configuration concepts.
- 2.5 2.5 Compare and contrast common networking hardware devices.
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- 2.7 2.7 Compare and contrast internet connection types, network types, and their characteristics.