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CompTIA N10-009 Exam Syllabus Topics:

SectionObjectives
Topic 1: Networking Concepts- OSI model and TCP/IP model
- Network topologies and types (LAN, WAN, WLAN)
- IPv4 and IPv6 addressing
- Ports, protocols, and services
Topic 2: Network Implementation- Wireless networking
- Network storage and virtualization
- Routing technologies
- Switching technologies
Topic 3: Network Operations- Network documentation and diagrams
- Monitoring and optimization
- Business continuity and disaster recovery
Topic 4: Network Security- Security concepts and threats
- Access control and authentication
- Network hardening techniques
Topic 5: Network Troubleshooting- Troubleshooting methodology
- Tools and diagnostic techniques
- Common network issues

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CompTIA Network+ Certification Exam Sample Questions (Q175-Q180):

NEW QUESTION # 175
A support engineer is troubleshooting a network outage that is affecting 3,000 users. The engineer has isolated the issue to the internet firewall. Packet captures confirm that the firewall is blocking the traffic. Which of the following is the next step in troubleshooting?

Answer: C

Explanation:
The troubleshooting methodology requires following a logical sequence. In this case, the engineer has already identified the problem (firewall blocking traffic) and confirmed it with evidence (packet captures). The next appropriate step is to create a plan of action that outlines how to resolve the issue and considers potential effects.
A . Implementing the solution is premature without planning.
C . Establishing a theory was already completed during problem isolation.
D . Documentation occurs after resolution.
By carefully planning, the engineer ensures that corrective action won't cause additional outages or security issues, especially given the scale of the incident (3,000 users).


NEW QUESTION # 176
Which of the following attacks would most likely cause duplicate IP addresses in a network?

Answer: D

Explanation:
Definition of a Rogue DHCP Server:
A rogue DHCP server is an unauthorized DHCP server on a network, which can assign IP addresses to devices without proper control, leading to IP address conflicts.
Impact of a Rogue DHCP Server:
IP Address Conflicts: Multiple devices may receive the same IP address from different DHCP servers, causing network connectivity issues.
Network Disruption: Devices may be assigned incorrect network configuration settings, disrupting network services and connectivity.


NEW QUESTION # 177
A network engineer is troubleshooting an issue with a VoIP network. After performing analysis, the engineer found that when users upload large files, voice quality is severely degraded. When no other traffic is on the network, voice quality is fine. Which of the following should the engineer do to most likely resolve the issue?

Answer: A


NEW QUESTION # 178
A network administrator needs to add 255 useable IP addresses to the network. A /24 is currently in use.
Which of the following prefixes would fulfill this need?

Answer: A

Explanation:
Explanation: A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.


NEW QUESTION # 179
A new staff member is unable to connect to the network. An IT support staff member finds the following:
- The IP configuration is correct
- The TCP/IP stack is working on the workstation
- The gateway is unreachable
Which of the following would the IT support staff member most likely check next?

Answer: C

Explanation:
The workstation has valid IP settings and a functioning TCP/IP stack, but cannot reach the gateway, indicating a Layer 2 issue. An incorrect VLAN assignment would place the device in a different network segment, preventing communication with the gateway.


NEW QUESTION # 180
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