Objective 2.1
220-1201Compare 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?
Correct.
Checked against datatracker.ietf.org, July 2026Concept
UDP is described as a transaction-oriented protocol that does not guarantee delivery or protect against duplicate datagrams, unlike TCP.
Why B
UDP is explicitly transaction oriented and does not provide guaranteed delivery, matching option B directly.
Source
RFC 768: User Datagram Protocol, checked July 2026The protocol is transaction oriented, and delivery and duplicate protection are not guaranteed.
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?
That’s 3 of the full A+ Core 1 bank.
Keep going free: 10 questions per certification in bank practice, with no account.
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.
More objectives in Networking
- 2.2 Explain wireless networking technologies.
- 2.3 Summarize services provided by networked hosts.
- 2.4 Explain common network configuration concepts.
- 2.5 Compare and contrast common networking hardware devices.
- 2.6 Given a scenario, configure basic wired/wireless small office/home office (SOHO) networks.
- 2.7 Compare and contrast internet connection types, network types, and their characteristics.
- 2.8 Explain networking tools and their purposes.