- A
No, because the speeds are different and will cause system instability.
Why wrong: Different speeds of the same DDR generation are generally compatible; the system will run at the slower speed, not become unstable.
- B
Yes, but only if they replace the existing modules entirely with the DDR3-1333 modules.
Why wrong: They can mix modules, but if they replace entirely, they lose the faster 1600 MHz capability.
- C
No, because DDR3-1333 is not compatible with DDR3-1600 slots.
Why wrong: All DDR3 modules use the same slot type and are compatible regardless of speed.
- D
Yes, they can add the DDR3-1333 modules, but all RAM will run at 1333 MHz.
Mixing speeds is allowed; the memory controller will run all modules at the speed of the slowest module, which is 1333 MHz.
220-1101 RAM Practice Question
This 220-1201 practice question tests your understanding of ram. 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.
A small office manager wants to upgrade the RAM in several identical workstations from 8 GB to 16 GB. The current modules are DDR3-1600. The company has a box of unused DDR3-1333 modules from an older system. Can they use these modules to upgrade the workstations?
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
Yes, they can add the DDR3-1333 modules, but all RAM will run at 1333 MHz.
DDR3-1333 and DDR3-1600 are both DDR3, so they are physically compatible. However, mixing speeds forces all modules to run at the slower 1333 MHz, which may slightly reduce performance. The upgrade is possible but not optimal.
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.
- ✗
No, because the speeds are different and will cause system instability.
Why it's wrong here
Different speeds of the same DDR generation are generally compatible; the system will run at the slower speed, not become unstable.
- ✗
Yes, but only if they replace the existing modules entirely with the DDR3-1333 modules.
Why it's wrong here
They can mix modules, but if they replace entirely, they lose the faster 1600 MHz capability.
- ✗
No, because DDR3-1333 is not compatible with DDR3-1600 slots.
Why it's wrong here
All DDR3 modules use the same slot type and are compatible regardless of speed.
- ✓
Yes, they can add the DDR3-1333 modules, but all RAM will run at 1333 MHz.
Why this is correct
Mixing speeds is allowed; the memory controller will run all modules at the speed of the slowest module, which is 1333 MHz.
Related concept
Static NAT maps one inside address to one outside address.
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 220-1201 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
RAM — This question tests RAM — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Yes, they can add the DDR3-1333 modules, but all RAM will run at 1333 MHz. — DDR3-1333 and DDR3-1600 are both DDR3, so they are physically compatible. However, mixing speeds forces all modules to run at the slower 1333 MHz, which may slightly reduce performance. The upgrade is possible but not optimal.
What should I do if I get this 220-1201 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 220-1201 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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Last reviewed: Jun 18, 2026
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