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Question 332 of 1,052
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CCNA Practice Question: Which TWO statements accurately describe the…
This 200-301 practice question tests your understanding of 200-301 exam topics. 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 TWO statements accurately describe the responsibilities of the OSI model's Transport layer?
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
✓
It segments data from the upper layers and manages end-to-end flow control.
The Transport layer (Layer 4) is responsible for end-to-end communication, segmentation of data, flow control, and error recovery. It uses protocols like TCP and UDP to ensure reliable or unreliable delivery.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It provides logical addressing and routing to determine the best path for data.
Why it's wrong here
Logical addressing and routing are functions of the Network layer (Layer 3).
- ✓
It segments data from the upper layers and manages end-to-end flow control.
- ✗
It converts data into electrical signals for transmission over the physical medium.
Why it's wrong here
Converting data into electrical signals is the function of the Physical layer (Layer 1).
- ✓
It provides reliable or unreliable delivery of data between applications on different hosts.
- ✗
It encapsulates data into frames and adds source and destination MAC addresses.
Why it's wrong here
Framing and MAC addressing are functions of the Data Link layer (Layer 2).
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.
✓It segments data from the upper layers and manages end-to-end flow control.Correct answer▾
Why this is correct
The Transport layer segments data into smaller units and can use flow control mechanisms (e.g., TCP's windowing) to prevent overwhelming the receiver.
✗It provides logical addressing and routing to determine the best path for data.Wrong answer — click to see why▾
Why this is wrong here
This describes the Network layer's role, not the Transport layer.
✗It converts data into electrical signals for transmission over the physical medium.Wrong answer — click to see why▾
Why this is wrong here
This is a Physical layer responsibility.
✗It encapsulates data into frames and adds source and destination MAC addresses.Wrong answer — click to see why▾
Why this is wrong here
This is a Data Link layer responsibility.
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: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 200-301 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this 200-301 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: It segments data from the upper layers and manages end-to-end flow control. — The Transport layer (Layer 4) is responsible for end-to-end communication, segmentation of data, flow control, and error recovery. It uses protocols like TCP and UDP to ensure reliable or unreliable delivery.
What should I do if I get this 200-301 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 200-301 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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