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CompTIA N10-009 Exam Syllabus Topics:

Topic
Details

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

Networking Concepts: For network administrators and IT support professionals, this domain covers

Topic 3

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 4

Network Implementation: For network technicians and junior network engineers, this section covers Characteristics of routing technologies, Configuration of switching technologies and features, and

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CompTIA Network+ Certification Exam Sample Questions (Q402-Q407):

NEW QUESTION # 402
A small business is deploying new phones, and some of the phones have full HD videoconferencing features. The Chief Information Officer (CIO) is concerned that the network might not be able to handle the traffic if it reaches a certain threshold. Which of the following can the network engineer configure to help ease these concerns?

A. A smaller subnet mask
B. Full duplex on all user ports
C. An IP helper to direct VoIP traffic
D. A VLAN with 100Mbps speed limits

Answer: B

Explanation:
Full duplex mode allows devices to send and receive data simultaneously, improving network performance and reducing congestion, which is critical for VoIP and video conferencing.
Breakdown of Options:
A . A VLAN with 100Mbps speed limits - VLANs segment traffic but limiting speeds to 100Mbps would worsen video performance.
B . An IP helper to direct VoIP traffic - IP helper is used for DHCP relay, not for VoIP optimization.
C . A smaller subnet mask - A smaller subnet reduces IP address availability but does not improve network performance.
D . Full duplex on all user ports - Correct answer. Full duplex eliminates collisions, allowing better VoIP and video performance.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 2.2: Compare and contrast various networking devices.
IEEE 802.3: Ethernet Full Duplex Operation

NEW QUESTION # 403
A network administrator's device is experiencing severe Wi-Fi interference within the corporate headquarters causing the device to constantly drop off the network. Which of the following is most likely the cause of the issue?

A. Too much wireless absorption
B. Too many wireless repeaters
C. Too much wireless reflection
D. Too many client connections

Answer: C

Explanation:
Severe Wi-Fi interference within a corporate headquarters causing devices to constantly drop off the network is most likely due to too much wireless reflection. Wireless reflection occurs when Wi-Fi signals bounce off surfaces like walls, metal, or glass, causing multipath interference. This can lead to poor signal quality and frequent disconnections. Other causes like wireless absorption, too many repeaters, or too many client connections can also affect Wi-Fi performance, but excessive reflection is a common culprit in environments with many reflective surfaces.
Reference: CompTIA Network+ Certification Exam Objectives - Wireless Networks section.

NEW QUESTION # 404
After providing a username and password, a user must input a passcode from a phone application. Which of the following authentication technologies is used in this example?

A. SSO
B. MFA
C. LDAP
D. SAML

Answer: B

Explanation:
This is an example of Multi-Factor Authentication (MFA) because it requires:
Something you know (username/password)
Something you have (a phone-generated passcode)
Breakdown of Options:
A: SSO (Single Sign-On) - Allows one login for multiple services, but does not add a second authentication factor.
B: LDAP (Lightweight Directory Access Protocol) - Used for directory authentication, not MFA.
C: MFA (Multi-Factor Authentication) - # Correct answer. Uses multiple authentication factors for better security.
D: SAML (Security Assertion Markup Language) - Used for federated identity management, not multi-factor authentication.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.5: Implement authentication and authorization methods.

NEW QUESTION # 405
What type of cable can plug directly into QSFP ports without needing separate optical transceivers?

A. RG11
B. Category 6
C. Twinaxial
D. Multimode

Answer: C

Explanation:
Twinaxial (Direct Attach Copper / DAC) cables can plug directly into QSFP ports without needing separate optical transceivers. They are cost-effective for short-distance, high-speed connections (commonly in data centers).
* A. Multimode fiber requires SFP/QSFP transceivers to convert electrical signals to optical.
* C. RG11 is coaxial cable for broadband/cable TV, not used in QSFP ports.
* D. Category 6 is twisted-pair Ethernet cabling, not directly compatible with QSFP ports.
References (CompTIA Network+ N10-009):
* Domain: Network Infrastructure - Cable types, QSFP, DAC (Twinaxial), transceiver requirements.

NEW QUESTION # 406
A network engineer receives a new router to use for WAN connectivity. Which of the following best describes the layer the network engineer should connect the new router to?

A. Core
B. Leaf
C. Access
D. Spine

Answer: B

Explanation:
Comprehensive and Detailed Explanation (paraphrased, aligned to N10-009):
In a spine-leaf architecture, endpoints (including servers, firewalls, and WAN/edge routers) connect to leaf switches. Leaf switches then uplink to spine switches; spine switches do not have endpoints connected directly to them. Therefore, a WAN router (an external/edge device) should connect to the leaf layer-often specifically to a "border leaf" that handles external connectivity.
* Why not B. Core or D. Spine? In spine-leaf, "core" isn't a formal layer, and spines are designed only to interconnect leafs, not to terminate endpoints.
* Why not A. Access? "Access" is a term from the traditional three-tier model (access-distribution-core).
In modern spine-leaf language, the analogous layer for endpoint attachment is the leaf.
References (CompTIA Network+ N10-009):
* Domain: Network Infrastructure - Data center and campus architectures (spine-leaf vs. three-tier), roles of leaf/spine, WAN/edge connectivity points.

NEW QUESTION # 407
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Joe Reed Joe Reed

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