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Question 734 of 1,052
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CCNA Practice Question: Which TWO of the following are correct regarding…
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 of the following are correct regarding Cisco SFP/SFP+ transceivers and their supported cable types?
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
✓
A 1000BASE-T SFP transceiver can operate over Category 5e UTP cable up to 100 meters.
SFP+ transceivers support 10 Gbps speeds and commonly use fiber optic cables (e.g., 10GBASE-SR for multimode fiber up to 300m). SFP transceivers support 1 Gbps speeds and can use copper twisted-pair cables (e.g., 1000BASE-T) up to 100m.
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.
- ✗
An SFP+ transceiver can be used with Category 6a UTP cable to achieve 10 Gbps over 100 meters.
Why it's wrong here
SFP+ transceivers are designed for fiber optic or direct-attach copper (DAC) cables, not twisted-pair copper. For 10GBASE-T over UTP, a different transceiver (10GBASE-T SFP+) would be needed, but it is not a standard SFP+ fiber transceiver.
- ✓
A 1000BASE-T SFP transceiver can operate over Category 5e UTP cable up to 100 meters.
Why this is correct
The 1000BASE-T standard uses twisted-pair copper cabling (Category 5e or better) and supports distances up to 100 meters. SFP transceivers for 1000BASE-T are available and widely used.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
A 10GBASE-LR SFP+ transceiver supports distances up to 10 kilometers over single-mode fiber.
Why this is correct
10GBASE-LR (Long Reach) is designed for single-mode fiber and supports distances up to 10 km (and sometimes up to 25 km depending on the module).
Related concept
Static NAT maps one inside address to one outside address.
- ✗
An SFP transceiver for 1000BASE-SX can achieve distances up to 5 kilometers over multimode fiber.
Why it's wrong here
1000BASE-SX (short wavelength) uses multimode fiber and typically supports distances up to 220m (with 62.5/125µm fiber) or 550m (with 50/125µm fiber), not 5 km. Longer distances require single-mode fiber and 1000BASE-LX.
- ✗
SFP+ transceivers are backward compatible with SFP slots and can operate at 1 Gbps if the module supports it.
Why it's wrong here
SFP+ slots are typically designed for 10 Gbps modules. While some SFP+ slots support SFP modules (they are electrically compatible), the statement is misleading because SFP+ transceivers themselves are not backward compatible with SFP slots; rather, SFP+ slots can accept SFP modules. The question asks about SFP+ transceivers, not slots.
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.
✓A 1000BASE-T SFP transceiver can operate over Category 5e UTP cable up to 100 meters.Correct answer▾
Why this is correct
The 1000BASE-T standard uses twisted-pair copper cabling (Category 5e or better) and supports distances up to 100 meters. SFP transceivers for 1000BASE-T are available and widely used.
✗An SFP+ transceiver can be used with Category 6a UTP cable to achieve 10 Gbps over 100 meters.Wrong answer — click to see why▾
Why this is wrong here
This is incorrect because standard SFP+ transceivers (e.g., 10GBASE-SR, 10GBASE-LR) use fiber optic cables, not twisted-pair copper. 10GBASE-T over UTP requires a specific SFP+ module, but the statement implies a generic SFP+ transceiver, which is not accurate.
✗An SFP transceiver for 1000BASE-SX can achieve distances up to 5 kilometers over multimode fiber.Wrong answer — click to see why▾
Why this is wrong here
This is incorrect because 1000BASE-SX is limited to a few hundred meters over multimode fiber, not kilometers.
✗SFP+ transceivers are backward compatible with SFP slots and can operate at 1 Gbps if the module supports it.Wrong answer — click to see why▾
Why this is wrong here
This is incorrect because an SFP+ transceiver (which operates at 10 Gbps) will not work in an SFP slot (designed for 1 Gbps). The backward compatibility refers to SFP+ slots accepting SFP modules, not the other way around.
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: A 1000BASE-T SFP transceiver can operate over Category 5e UTP cable up to 100 meters. — SFP+ transceivers support 10 Gbps speeds and commonly use fiber optic cables (e.g., 10GBASE-SR for multimode fiber up to 300m). SFP transceivers support 1 Gbps speeds and can use copper twisted-pair cables (e.g., 1000BASE-T) up to 100m.
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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