- A
Transport layer
Why wrong: The transport layer (Layer 4) provides end-to-end communication, flow control, and error recovery, but it does not manage sessions or checkpoints. That is the role of the session layer.
- B
Session layer
The session layer (Layer 5) is responsible for establishing, maintaining, and terminating sessions between applications. It also provides synchronization points for checkpointing and recovery.
- C
Network layer
Why wrong: The network layer (Layer 3) handles logical addressing and routing. It does not manage application sessions.
- D
Data link layer
Why wrong: The data link layer (Layer 2) is responsible for framing, MAC addressing, and error detection on a single link. It does not handle sessions.
Question 109 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.
In the OSI model, which layer is responsible for establishing, managing, and terminating sessions between applications, as well as providing checkpoints and recovery?
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
✓
Session layer
The Session layer (Layer 5) of the OSI model is explicitly responsible for establishing, managing, and terminating sessions between applications, as well as providing checkpointing and recovery mechanisms. This layer uses protocols like NetBIOS, RPC, and PPTP to coordinate dialog control, synchronization points, and session restoration after failures, ensuring that long-lived transactions can resume from a checkpoint rather than restarting entirely.
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.
- ✗
Transport layer
Why it's wrong here
The transport layer (Layer 4) provides end-to-end communication, flow control, and error recovery, but it does not manage sessions or checkpoints. That is the role of the session layer.
When this WOULD be correct
A question asking which layer provides reliable data transfer, error recovery, and flow control between hosts would make the Transport layer correct.
- ✓
Session layer
Why this is correct
The session layer (Layer 5) is responsible for establishing, maintaining, and terminating sessions between applications. It also provides synchronization points for checkpointing and recovery.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Network layer
Why it's wrong here
The network layer (Layer 3) handles logical addressing and routing. It does not manage application sessions.
When this WOULD be correct
A question asking which layer handles logical addressing and path determination between different networks would have the Network layer as the correct answer.
- ✗
Data link layer
Why it's wrong here
The data link layer (Layer 2) is responsible for framing, MAC addressing, and error detection on a single link. It does not handle sessions.
When this WOULD be correct
A question asking which OSI layer is responsible for framing, MAC addressing, and error detection in local network communication would have the data link layer as the correct answer.
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.
✓Session layerCorrect answer▾
Why this is correct
The session layer (Layer 5) is responsible for establishing, maintaining, and terminating sessions between applications. It also provides synchronization points for checkpointing and recovery.
✗Transport layerWrong answer — click to see why▾
Why this is wrong here
The Transport layer handles end-to-end communication, segmentation, and flow control, but not session establishment, management, termination, checkpoints, or recovery.
★ When this WOULD be the correct answer
A question asking which layer provides reliable data transfer, error recovery, and flow control between hosts would make the Transport layer correct.
Why candidates choose this
Candidates may confuse session management with the reliable delivery and recovery features of the Transport layer, especially TCP's connection establishment and recovery mechanisms.
✗Network layerWrong answer — click to see why▾
Why this is wrong here
The Network layer (Layer 3) is responsible for routing and forwarding packets across networks, not for session management, checkpoints, or recovery.
★ When this WOULD be the correct answer
A question asking which layer handles logical addressing and path determination between different networks would have the Network layer as the correct answer.
Why candidates choose this
Candidates may confuse the Network layer's role in establishing connections (e.g., virtual circuits in connection-oriented networks) with session management functions.
✗Data link layerWrong answer — click to see why▾
Why this is wrong here
The data link layer (Layer 2) handles node-to-node data transfer, error detection, and framing, not session management, checkpoints, or recovery.
★ When this WOULD be the correct answer
A question asking which OSI layer is responsible for framing, MAC addressing, and error detection in local network communication would have the data link layer as the correct answer.
Why candidates choose this
Candidates may confuse the data link layer's error detection and flow control with the session layer's checkpoint and recovery functions, or they might mistakenly think session management occurs at lower layers.
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 N10-009 exam often tests the Session layer by describing its functions in a way that sounds like Transport-layer reliability (e.g., 'checkpoints and recovery'), leading candidates to mistakenly choose the Transport layer because they associate recovery with TCP's retransmission, but TCP only recovers lost segments, not application sessions.
Detailed technical explanation
How to think about this question
Under the hood, the Session layer inserts synchronization points (checkpoints) into the data stream, allowing applications to roll back to a known state if a failure occurs—this is critical in protocols like NetBIOS for file sharing or RPC for distributed computing. In real-world scenarios, a database transaction spanning multiple packets can use session-layer checkpoints to avoid re-sending millions of rows after a network interruption, a behavior that Transport-layer retransmission alone cannot provide because it lacks application-level context.
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
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Networking Concepts — study guide chapter
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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: Session layer — The Session layer (Layer 5) of the OSI model is explicitly responsible for establishing, managing, and terminating sessions between applications, as well as providing checkpointing and recovery mechanisms. This layer uses protocols like NetBIOS, RPC, and PPTP to coordinate dialog control, synchronization points, and session restoration after failures, ensuring that long-lived transactions can resume from a checkpoint rather than restarting entirely.
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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