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CompTIA N10-009 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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 2
  • Cloud concepts and connectivity options, and Common networking ports.
Topic 3
  • OSI reference model concepts, Comparison of networking appliances, applications, and functions

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CompTIA Network+ Certification Exam Sample Questions (Q356-Q361):

NEW QUESTION # 356
Which of the following connectors allows a singular QSFP transceiver to have several physical connections?

Answer: B

Explanation:
The MPO (Multi-fiber Push On) connector is designed to handle multiple fiber strands in a single connector, and it is commonly used with high-density transceivers like QSFP (Quad Small Form-factor Pluggable).
QSFP can support up to four channels (hence "quad"), and MPO connectors can interface multiple fibers (e.g., 8, 12, 24), making them ideal for 40Gbps or 100Gbps deployments.
RJ45 (A) is used for Ethernet over copper.
ST (B) and LC (C) are single-fiber connectors - they don't support the multi-fiber needs of QSFP setups.
โœ… Therefore, MPO is the correct connector type for this use case.
Reference:


NEW QUESTION # 357
A security administrator is creating a new firewall object for a device with IP address 192.168.100.1/25.
However, the firewall software only uses dotted decimal notation in configuration fields. Which of the following is the correct subnet mask to use?

Answer: D

Explanation:
A /25 subnet mask means 25 bits are reserved for the network portion, leaving 7 bits for host addresses. In dotted decimal, that is:
11111111.11111111.11111111.10000000
Decimal equivalent: 255.255.255.128
A). 255.255.254.0 corresponds to /23.
B). 255.255.255.1 is invalid as a subnet mask.
D). 255.255.255.192 corresponds to /26.
Thus, the correct subnet mask for a /25 network is 255.255.255.128.
References (CompTIA Network+ N10-009):
Domain: Networking Concepts - Subnetting, CIDR notation, dotted decimal.


NEW QUESTION # 358
A network engineer is designing a secure communication link between two sites. The entire data stream needs to remain confidential. Which of the following will achieve this goal?

Answer: A


NEW QUESTION # 359
A network technician was recently onboarded to a company. A manager has tasked the technician with documenting the network and has provided the technician With partial information from previous documentation.
Instructions:
Click on each switch to perform a network discovery by entering commands into the terminal. Fill in the missing information using drop-down menus provided.

Answer:

Explanation:
See the Explanation for detailed information on this simulation.
Explanation:
(Note: Ips will be change on each simulation task, so we have given example answer for the understanding) To perform a network discovery by entering commands into the terminal, you can use the following steps:
Click on each switch to open its terminal window.
Enter the command show ip interface brief to display the IP addresses and statuses of the switch interfaces.
Enter the command show vlan brief to display the VLAN configurations and assignments of the switch interfaces.
Enter the command show cdp neighbors to display the information about the neighboring devices that are connected to the switch.
Fill in the missing information in the diagram using the drop-down menus provided.
Here is an example of how to fill in the missing information for Core Switch 1:
The IP address of Core Switch 1 is 192.168.1.1.
The VLAN configuration of Core Switch 1 is VLAN 1: 192.168.1.0/24, VLAN 2: 192.168.2.0/24, VLAN 3:
192.168.3.0/24.
The neighboring devices of Core Switch 1 are Access Switch 1 and Access Switch 2.
The interfaces that connect Core Switch 1 to Access Switch 1 are GigabitEthernet0/1 and GigabitEthernet0/2.
The interfaces that connect Core Switch 1 to Access Switch 2 are GigabitEthernet0/3 and GigabitEthernet0/4.
You can use the same steps to fill in the missing information for Access Switch 1 and Access Switch 2.


NEW QUESTION # 360
Some newly installed wireless access points are not broadcasting. Which of the following is the most likely cause of the issue?

Answer: B

Explanation:
The most likely cause is that the PoE power budget has been exceeded. Wireless access points commonly receive power through Power over Ethernet. If newly installed APs are not broadcasting at all, one of the first things to verify is whether the switch has enough available PoE capacity to power them. A switch can have enough physical ports available but still lack sufficient PoE wattage. When the total PoE budget is exhausted, some APs may fail to power on, partially boot, reboot repeatedly, or never begin broadcasting an SSID.
The CompTIA Network+ N10-009 objectives include network devices, wireless infrastructure, PoE, power budgets, and troubleshooting physical connectivity. Wireless APs must have both data connectivity and sufficient power before they can operate normally. An improper VLAN assignment could prevent clients from reaching network resources or receiving DHCP addresses, but the AP would usually still power on and broadcast. Limited signal strength would affect coverage, not prevent broadcasting entirely. An uplink transceiver issue applies more to fiber or modular uplink connections and is less likely for newly installed APs. Therefore, the best answer is PoE power budget exceeded.


NEW QUESTION # 361
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