Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A company is connecting two buildings that are 300 meters apart. The link must support 10 Gbps. Which combination of cable and transceiver should be used?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Cat6a UTP with 10GBASE-T
Cat6a supports 10GBASE-T, but the maximum distance is only 100 meters, insufficient for 300 meters.
B
Distractor review
Cat5e UTP with 1000BASE-T
Cat5e only supports up to 1 Gbps and is limited to 100 meters, not meeting the speed or distance requirements.
C
Best answer
Single-mode fiber with 10GBASE-LR
10GBASE-LR over single-mode fiber supports 10 Gbps up to 10 km, fully satisfying the 300-meter distance.
D
Distractor review
Multimode fiber with 10GBASE-SR
10GBASE-SR over multimode fiber can reach 300-400 meters with OM4 fiber, but single-mode fiber provides a more reliable and future-proof solution for this distance.
Common exam trap
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.
Technical deep dive
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A network engineer needs to connect two switches located 400 meters apart. The cable run includes high electromagnetic interference from nearby machinery. The engineer decides to use fiber optic cabling. Which transceiver type and fiber combination should be used to ensure the link reaches 400 meters while remaining cost-effective?
Question 2
A network engineer is designing a new switched network and needs to ensure that broadcast traffic from one department does not reach another department's workstations. The engineer plans to use VLANs. Which of the following must be configured on the switches to isolate broadcast domains as intended?
Question 3
A security engineer is configuring a site-to-site VPN between two branch offices. The requirement is to encrypt all traffic between the two networks using IPsec. Which IPsec mode should be used to encrypt the entire IP packet including the original header?
Question 4
A network administrator is connecting two switches to increase bandwidth and provide redundancy. Which technology should be used to combine multiple physical links into a single logical link?
Question 5
A network administrator is experiencing issues where unauthorized devices are offering IP addresses to clients, causing connectivity problems. Which security feature should be enabled on switches to prevent this?
Question 6
A network administrator is troubleshooting a connectivity issue and suspects the problem is related to the physical cabling. At which layer of the OSI model should the administrator begin their investigation?
FAQ
Questions learners often ask
What does this N10-009 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Single-mode fiber with 10GBASE-LR — Single-mode fiber with 10GBASE-LR transceivers can support 10 Gbps over distances up to 10 km, easily covering the 300-meter requirement. Cat6a is limited to 100 meters for 10GBASE-T, and multimode fiber with 10GBASE-SR typically has a reach of 300-400 meters depending on the fiber grade but is less reliable over longer distances compared to single-mode.
What should I do if I get this N10-009 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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