CCNA Network Infrastructure and Connectivity Practice Question
This 200-301 practice question tests your understanding of network infrastructure and connectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: tCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two statements accurately compare TCP and UDP? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
TCP provides connection-oriented transport
TCP is connection-oriented and uses sequencing, acknowledgments, and related controls. UDP is simpler and has lower overhead, but it does not guarantee delivery.
Key principle: TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
TCP provides connection-oriented transport
Why this is correct
Correct. TCP is a connection-oriented transport protocol.
Related concept
TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
✗
UDP guarantees delivery through acknowledgments
Why it's wrong here
UDP does not guarantee delivery with acknowledgments.
When this WOULD be correct
In a hypothetical question asking about a protocol that ensures reliable delivery through acknowledgments, such as TCP, option B would be correct. For example, a question might ask which protocol guarantees message delivery in a streaming application.
✓
UDP has lower overhead than TCP
Why this is correct
Correct. UDP generally has lower header and session-management overhead.
Related concept
TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
In a different exam question that specifically asks about a transport protocol that does not use port numbers, such as a hypothetical protocol designed for a specific application without the need for multiplexing, option D would be correct.
✗
UDP is always faster because it avoids congestion
Why it's wrong here
UDP may have lower overhead, but always faster is too absolute and not technically sound.
When this WOULD be correct
In a different exam scenario where the question asks about the performance characteristics of various transport protocols under specific conditions, such as low-latency networks or real-time applications, this option could be correct if it emphasizes that UDP's design allows for faster data transmission in those contexts.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Correct. TCP is a connection-oriented transport protocol.
✗UDP guarantees delivery through acknowledgmentsWrong answer — click to see why▾
Why this is wrong here
UDP is a connectionless protocol that does not use acknowledgments, sequence numbers, or retransmissions; it simply sends datagrams without any guarantee of delivery. Reliable delivery mechanisms like acknowledgments are a feature of TCP, not UDP.
★ When this WOULD be the correct answer
In a hypothetical question asking about a protocol that ensures reliable delivery through acknowledgments, such as TCP, option B would be correct. For example, a question might ask which protocol guarantees message delivery in a streaming application.
Why candidates choose this
Students may confuse UDP's lack of reliability with the idea that it still provides some form of delivery confirmation, or they might think that all transport protocols use acknowledgments because TCP does.
✗TCP does not use port numbersWrong answer — click to see why▾
Why this is wrong here
TCP uses port numbers extensively to identify source and destination applications, just like UDP. Port numbers are a fundamental part of both TCP and UDP headers, enabling multiplexing of multiple services on a single host.
★ When this WOULD be the correct answer
In a different exam question that specifically asks about a transport protocol that does not use port numbers, such as a hypothetical protocol designed for a specific application without the need for multiplexing, option D would be correct.
Why candidates choose this
A student might incorrectly associate port numbers only with UDP because of the phrase 'UDP port numbers' commonly used, or they might think TCP's connection-oriented nature somehow replaces the need for port numbers.
✗UDP is always faster because it avoids congestionWrong answer — click to see why▾
Why this is wrong here
While UDP has lower overhead and can be faster in some scenarios, it is not 'always faster' because network congestion, packet loss, and application behavior can affect performance. Additionally, UDP does not inherently avoid congestion; it simply does not implement congestion control, which can lead to network congestion if used aggressively.
★ When this WOULD be the correct answer
In a different exam scenario where the question asks about the performance characteristics of various transport protocols under specific conditions, such as low-latency networks or real-time applications, this option could be correct if it emphasizes that UDP's design allows for faster data transmission in those contexts.
Why candidates choose this
The statement 'UDP is faster' is a common oversimplification. Students may assume that because UDP has less overhead, it is always faster, ignoring factors like retransmissions in TCP that can actually improve throughput in lossy networks.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
Be careful not to confuse the connection-oriented nature of TCP with UDP's connectionless design. Remember that TCP is about reliability, while UDP focuses on speed and simplicity.
Detailed technical explanation
How to think about this question
TCP is a transport layer protocol that establishes a connection between sender and receiver before data transmission begins. It uses a three-way handshake to set up the session and employs sequencing, acknowledgments, and flow control to guarantee reliable and ordered delivery of data. This connection-oriented nature ensures that packets arrive intact and in order, which is critical for applications like web browsing, email, and file transfers.
UDP, in contrast, is a connectionless protocol that sends datagrams without establishing a session or confirming receipt. It has a simpler header and does not perform sequencing or acknowledgments, resulting in lower overhead and faster transmission. UDP is suitable for applications where speed is prioritized over reliability, such as streaming, VoIP, and online gaming.
A common exam trap is assuming UDP always delivers data faster because it avoids congestion control. While UDP has lower overhead, it does not manage congestion or retransmissions, which can lead to packet loss in congested networks. Cisco devices and CCNA exams emphasize understanding these trade-offs to select the appropriate protocol for specific network scenarios.
KKey Concepts to Remember
TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
UDP operates as a connectionless protocol that sends data without establishing or maintaining a session.
TCP guarantees reliable data delivery through sequencing, acknowledgments, and retransmission mechanisms.
UDP has lower overhead than TCP because it does not use sequencing, acknowledgments, or flow control.
TCP uses port numbers to identify application endpoints and manage multiple simultaneous connections.
UDP uses port numbers but does not guarantee delivery or order of packets.
TCP’s connection-oriented nature makes it suitable for applications requiring reliability, such as HTTP and FTP.
UDP’s lower overhead and connectionless design make it ideal for real-time applications like VoIP and streaming.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-301 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review tCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake., then practise related 200-301 questions on the same topic to reinforce the concept.
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake..
What is the correct answer to this question?
The correct answer is: TCP provides connection-oriented transport — TCP is connection-oriented and uses sequencing, acknowledgments, and related controls. UDP is simpler and has lower overhead, but it does not guarantee delivery.
What should I do if I get this 200-301 question wrong?
Review tCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
TCP provides connection-oriented transport by establishing a session before data transfer using a three-way handshake.
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