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CompTIA N10-009 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Network Operations: For IT operations staff and network operations center (NOC) technicians, this part of the exam covers the purpose of organizational processes and procedures and use of network monitoring technologies.
Topic 2
  • Network Security: This section of the exam for cybersecurity specialists and network security administrators covers the importance of basic network security concepts, Various types of attacks and their impact on the network, application of network security features, defense techniques, and solutions.| Network Troubleshooting: For help desk technicians and network support specialists, this section covers troubleshooting methodology, troubleshooting common cabling and physical interface issues, troubleshooting common issues with network services, and use of appropriate tools or protocols to solve networking issues.
Topic 3
  • Networking Concepts: For network administrators and IT support professionals, this domain covers
Topic 4
  • Selection and configuration of wireless devices.

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CompTIA Network+ Certification Exam Sample Questions (Q584-Q589):

NEW QUESTION # 584
Which of the following acts as the core of a network?

Answer: C

Explanation:
The main distribution frame is the central point where network connections are aggregated and interconnected, serving as the core of the network infrastructure.


NEW QUESTION # 585
A customer is adding fiber connectivity between adjacent buildings. A technician terminates the multimode cable to the fiber patch panel. After the technician connects the fiber patch cable, the indicator light does not turn on. Which of the following should a technician try first to troubleshoot this issue?

Answer: B

Explanation:
When working with fiber optic cables, one common issue is that the transmit (TX) and receive (RX) fibers might be reversed. The first step in troubleshooting should be to reverse the fibers at one end to ensure they are correctly aligned (TX to RX and RX to TX). This is a simple and quick step to rule out a common issue before moving on to more complex troubleshooting.
Reference: CompTIA Network+ study materials.


NEW QUESTION # 586
Users at an organization report that the wireless network is not working in some areas of the building. Users report that other wireless network SSIDs are visible when searching for the network, but the organization's network is not displayed. Which of the following is the most likely cause?

Answer: B

Explanation:
If the company's SSID is not visible in some areas while other networks are still visible, the most likely cause is insufficient wireless coverage. The wireless signal does not reach those areas, meaning additional access points or signal boosters may be required.
Breakdown of Options:
A . Interference or channel overlap - Would cause slow or unstable connections, but the SSID should still be visible.
B . Insufficient wireless coverage - โœ… Correct answer. If the SSID is not appearing, the signal is too weak in that area.
C . Roaming misconfiguration - Would cause devices to stay on weaker APs instead of switching, but the SSID should still be visible.
D . Client disassociation issues - This would disconnect users, but they should still see the network.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.6: Explain wireless concepts and technologies.


NEW QUESTION # 587
A network administrator is in the process of installing 35 PoE security cameras. After the administrator installed and tested the new cables, the administrator installed the cameras. However, a small number of the cameras do not work. Which of the following is the most reason?

Answer: D

Explanation:
When installing multiple Power over Ethernet (PoE) devices like security cameras, it is crucial to ensure that the total power requirement does not exceed the power budget of the PoE switch. Each PoE switch has a maximum power capacity, and exceeding this capacity can cause some devices to fail to receive power.
* PoE Standards: PoE switches conform to standards such as IEEE 802.3af (PoE) and 802.3at (PoE+), each with specific power limits per port and total power capacity.
* Power Calculation: Adding up the power requirements of all connected PoE devices can help determine if the total power budget of the switch is exceeded.
* Symptoms: When the power budget is exceeded, some devices, typically those farthest from the switch or connected last, may not power up or function correctly.
Network References:
* CompTIA Network+ N10-007 Official Certification Guide: Covers PoE standards and troubleshooting power issues.
* Cisco Networking Academy: Discusses PoE technologies, power budgeting, and managing PoE devices.
* Network+ Certification All-in-One Exam Guide: Provides information on PoE setup, including power budget considerations.


NEW QUESTION # 588
Which of the following best describes a characteristic of a DNS poisoning attack?

Answer: A

Explanation:
DNS poisoning (also commonly called DNS cache poisoning) is characterized by inserting fraudulent DNS data into a resolver's cache so that subsequent queries return incorrect IP mappings. Option D describes this precisely: false DNS records are injected into a DNS server's cache, causing users to be redirected to attacker- controlled destinations even when they request a legitimate hostname. This aligns with Network+ security objectives covering common network attacks targeting name resolution and trust relationships. Editing authoritative DNS records on a DNS server (A) implies direct compromise or unauthorized administrative change, which is a different scenario than cache poisoning. Setting up a malicious DNS server in place of a legitimate server (B) is closer to DNS hijacking or rogue DNS configuration rather than cache poisoning.
Intercepting client requests and returning false responses (C) describes man-in-the-middle style spoofing on the wire; while related, the defining "poisoning" trait is the persistence created by corrupting the cache so the bad answer continues to be served. For defensive relevance in Network+ scope, cache poisoning highlights the importance of DNS security controls such as source port randomization, transaction ID entropy, and DNSSEC validation where applicable.


NEW QUESTION # 589
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