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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Network+ Certification Exam |
| Exam Number: | N10-009 |
| Certificate Validity Period: | 3 years |
| Exam Price: | $369 USD |
| Exam Duration: | 90 minutes |
| Available Languages: | English, German, Portuguese, Japanese, Spanish |
| Passing Score: | 720 (scale 100โ900) |
| Related Certifications: | CompTIA A+ CompTIA Server+ CompTIA Cloud+ CompTIA Security+ |
| Exam Format: | Multiple-choice, Performance-based questions |
| Real Exam Qty: | Up to 90 |
| Recommended Training: | CompTIA Study Materials CompTIA Official Training |
| Exam Registration: | Pearson VUE Exam Scheduling CompTIA Official Registration |
| Sample Questions: | CompTIA N10-009 Sample Questions |
| Exam Way: | Online remote proctored or onsite at authorized Pearson VUE test centers |
| Pre Condition: | No mandatory prerequisites; recommended: CompTIA A+ certification and 9โ12 months of hands-on networking experience |
| Official Syllabus URL: | https://www.comptia.org/en-us/certifications/network/ |
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NEW QUESTION # 209
A network engineer queries a hostname using dig, and a valid IP address is returned. However, when the engineer queries that same IP address using dig, no hostname is returned. Which of the following DNS records is missing?
Answer: B
Explanation:
A reverse DNS lookup requires a PTR record to map an IP address back to a hostname. The absence of a returned hostname when querying the IP indicates the PTR record is missing.
NEW QUESTION # 210
As part of an attack, a threat actor purposefully overflows the content-addressable memory (CAM) table on a switch. Which of the following types of attacks is this scenario an example of?
Answer: B
Explanation:
* Definition of MAC Flooding:
* MAC flooding is an attack where a malicious actor sends numerous fake MAC addresses to a switch, overwhelming its CAM table. The CAM table stores MAC addresses and their associated ports for efficient traffic forwarding.
* Impact of MAC Flooding:
* CAM Table Overflow: When the CAM table is full, the switch cannot learn new MAC addresses and is forced to broadcast traffic to all ports, leading to a degraded network performance and
* potential data interception.
* Switch Behavior: The switch operates in a fail-open mode, treating the network as a hub, which can be exploited for eavesdropping on traffic.
* Comparison with Other Attacks:
* ARP Spoofing: Involves sending false ARP (Address Resolution Protocol) messages to associate the attacker's MAC address with the IP address of another device.
* Evil Twin: Involves creating a rogue wireless access point that mimics a legitimate one to intercept data.
* DNS Poisoning: Involves corrupting the DNS cache with false information to redirect traffic to malicious sites.
* Preventive Measures:
* Port Security: Configure port security on switches to limit the number of MAC addresses per port, preventing CAM table overflow.
* Network Segmentation: Use VLANs to segment network traffic and limit the impact of such attacks.
References:
* CompTIA Network+ study materials on network security threats and mitigation techniques.
NEW QUESTION # 211
Which of the following is created to illustrate the effectiveness of wireless networking coverage in a building?
Answer: C
Explanation:
* Definition of Heat Maps:
* A heat map is a graphical representation of data where individual values are represented by colors.
In the context of wireless networking, a heat map shows the wireless signal strength in different areas of a building.
* Purpose of a Heat Map:
* Heat maps are used to illustrate the effectiveness of wireless networking coverage, identify dead zones, and optimize the placement of access points (APs) to ensure adequate coverage and performance.
* Comparison with Other Options:
* Logical Diagram:Represents the logical connections and relationships within the network.
* Layer 3 Network Diagram:Focuses on the routing and IP addressing within the network.
* Service-Level Agreement (SLA):A contract that specifies the expected service levels between a service provider and a customer.
* Creation and Use:
* Heat maps are created using specialized software or tools that measure wireless signal strength throughout the building. The data collected is then used to generate a visual map, guiding network administrators in optimizing wireless coverage.
References:
* CompTIA Network+ certification materials and wireless network planning guides.
NEW QUESTION # 212
A customer needs six usable IP addresses. Which of the following best meets this requirement?
Answer: D
Explanation:
To meet the requirement of six usable IP addresses, the subnet mask 255.255.255.240 (also represented as /28) is the best fit. A /28 subnet provides 16 total IP addresses, out of which 14 are usable (the first address is the network address, and the last address is the broadcast address). This meets and exceeds the requirement for six usable IP addresses, ensuring there are enough addresses for future expansion if needed. The other options provide either too few or too many addresses for this specific requirement.
NEW QUESTION # 213
Company C is acquiring Company A and Company B. Company C needs to merge all three networks into one Class B network. Additionally, the network capacity of each company needs to grow by 20%. Company C also requires segmentation of Company A and Company B to account for unknown security vulnerabilities within each.
Instructions:
Select the correct subnet range to meet Company C ' s requirements.
Answer:
Explanation:
Explanation:
A = 192.168.10.0/26
B = 192.168.1.0/23
C = 10.0.0.1/18
Using the choices shown in the screenshot, the best-fit subnet selections are based on host growth requirements first, then segmentation.
For Company A, the current device count is 32. With 20% growth, that becomes about 39 devices. A /27 only supports 30 usable hosts, so it is too small. A /26 supports 62 usable hosts, so 192.168.10.0/26 is the correct choice.
For Company B, the current device count is 100. With 20% growth, that becomes 120 devices. The smallest correct subnet would normally be a /25 with 126 usable hosts, but that option is not shown. From the available choices, 192.168.1.0/23 is the smallest subnet that still supports more than 120 hosts, so that is the best answer.
For Company C, the current device count is 10,000. With 20% growth, it needs space for 12,000 hosts. A /18 provides 16,382 usable hosts, while a /19 is not available and a /21 or /22 would be far too small. Therefore,
10.0.0.1/18 is the correct selection.
One important note: the dropdown choices shown do not actually let all three companies be placed into a single true Class B network block. So these answers are the best valid selections from the provided options.
NEW QUESTION # 214
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