Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company wants to ensure that only authorized devices that comply with security policies (such as updated antivirus and OS patches) are allowed to connect to the internal network. Both wired and wireless connections are used. Which of the following security solutions would best enforce this requirement?
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
VPN
A VPN encrypts traffic between a client and network but does not enforce device compliance policies. It assumes the device is already trusted.
B
Best answer
Network Access Control (NAC)
NAC solutions like Cisco ISE or Aruba ClearPass can enforce security policies by scanning endpoints before allowing access and quarantining non-compliant devices.
C
Distractor review
Access control list (ACL)
ACLs filter traffic based on packet attributes but do not evaluate device health or compliance. They are stateless and cannot enforce pre-admission policies.
D
Distractor review
Intrusion prevention system (IPS)
An IPS monitors and blocks malicious traffic but does not perform endpoint compliance checks before granting network access.
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: Network Access Control (NAC) — Network Access Control (NAC) solutions evaluate each device's compliance with security policies before granting network access. NAC can check for antivirus updates, OS patches, and other settings. VPN (A) provides encrypted tunnels but does not enforce endpoint compliance. ACLs (C) filter traffic based on IP or port but do not assess device posture. IPS (D) monitors for malicious activity but does not perform pre-admission checks.
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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