- A
One-to-one communication
Unicast delivers data to a single destination host.
- B
One-to-many communication
Why wrong: This describes multicast transmission.
- C
One-to-all communication
Why wrong: This describes broadcast transmission.
- D
Many-to-many communication
Why wrong: This is not a standard network transmission type; anycast is one-to-one-of-many.
Question 263 of 520
N10-009 Networking Concepts Practice Question
This N10-009 practice question tests your understanding of networking concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 of the following describes a unicast transmission?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
One-to-one communication
Unicast transmission is defined as one-to-one communication where a single source sends data to a single destination. In IPv4 networking, this is the standard method for most client-server interactions, such as a host sending an HTTP request to a web server. The destination MAC address in the Ethernet frame is the unique address of the target device, ensuring only that device processes the frame.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
One-to-one communication
Why this is correct
Unicast delivers data to a single destination host.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
One-to-many communication
Why it's wrong here
This describes multicast transmission.
When this WOULD be correct
This option would be correct for a question asking: 'Which of the following describes a multicast transmission?' or 'Which type of transmission sends data from one source to multiple specific recipients?'
- ✗
One-to-all communication
Why it's wrong here
This describes broadcast transmission.
When this WOULD be correct
This option would be correct if the question asked: 'Which of the following describes a broadcast transmission?' or 'Which term refers to sending data from one device to all devices on a network?'
- ✗
Many-to-many communication
Why it's wrong here
This is not a standard network transmission type; anycast is one-to-one-of-many.
When this WOULD be correct
In a question asking about a multicast or anycast transmission type, 'Many-to-many communication' could be correct if the exam defines multicast as a many-to-many model (e.g., in some older networking 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 N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓One-to-one communicationCorrect answer▾
Why this is correct
Unicast delivers data to a single destination host.
✗One-to-many communicationWrong answer — click to see why▾
Why this is wrong here
Unicast transmission is defined as one-to-one communication, not one-to-many. One-to-many communication is multicast, where data is sent from one source to a specific group of recipients.
★ When this WOULD be the correct answer
This option would be correct for a question asking: 'Which of the following describes a multicast transmission?' or 'Which type of transmission sends data from one source to multiple specific recipients?'
Why candidates choose this
Candidates may confuse unicast with multicast because both involve a single source, but they incorrectly assume 'one-to-many' is unicast due to misunderstanding the 'uni-' prefix as 'one source' rather than 'one destination'.
✗One-to-all communicationWrong answer — click to see why▾
Why this is wrong here
Unicast transmission is defined as one-to-one communication, not one-to-all. One-to-all communication is broadcast, where a single sender transmits to all devices on the network.
★ When this WOULD be the correct answer
This option would be correct if the question asked: 'Which of the following describes a broadcast transmission?' or 'Which term refers to sending data from one device to all devices on a network?'
Why candidates choose this
Candidates may confuse 'unicast' with 'broadcast' due to similar prefixes or misunderstand that 'uni-' means one sender, not one receiver.
✗Many-to-many communicationWrong answer — click to see why▾
Why this is wrong here
Unicast transmission is defined as one-to-one communication, not many-to-many. Many-to-many communication describes multicast or anycast in some contexts, but not unicast.
★ When this WOULD be the correct answer
In a question asking about a multicast or anycast transmission type, 'Many-to-many communication' could be correct if the exam defines multicast as a many-to-many model (e.g., in some older networking contexts).
Why candidates choose this
Candidates may confuse unicast with other transmission types, mistakenly thinking that multiple senders and receivers are involved in unicast, or they may not clearly distinguish between unicast, multicast, and broadcast.
Analysis generated from the official N10-009blueprint 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
The trap here is that candidates often confuse unicast with multicast because both involve a single source, but they forget that unicast is strictly one-to-one, while multicast is one-to-many to a subscribed group.
Detailed technical explanation
How to think about this question
Unicast relies on the Address Resolution Protocol (ARP) to map a destination IP address to its corresponding MAC address before the frame is sent. In switched Ethernet, the switch learns the MAC address of each port and forwards unicast frames only to the specific port where the destination device resides, preserving bandwidth. This is in contrast to broadcast frames, which are flooded to all ports except the ingress port, and multicast frames, which are forwarded only to ports that have joined the multicast group via IGMP snooping.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the N10-009 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this N10-009 question test?
Networking Concepts — This question tests Networking Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: One-to-one communication — Unicast transmission is defined as one-to-one communication where a single source sends data to a single destination. In IPv4 networking, this is the standard method for most client-server interactions, such as a host sending an HTTP request to a web server. The destination MAC address in the Ethernet frame is the unique address of the target device, ensuring only that device processes the frame.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
This N10-009 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the N10-009 exam.
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