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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Network+ Certification Exam |
| Exam Number: | N10-009 |
| Certificate Validity Period: | 3 years |
| Available Languages: | Portuguese, Spanish, German, English, Japanese |
| Exam Price: | $369 USD |
| Passing Score: | 720 (on a scale of 100-900) |
| Exam Duration: | 90 minutes |
| Exam Format: | Multiple-choice, Performance-based |
| Real Exam Qty: | Maximum 90 |
| Related Certifications: | CompTIA Network+ |
| Sample Questions: | CompTIA N10-009 Sample Questions |
| Exam Way: | Online or in-person testing at Pearson VUE test centers. |
| Pre Condition: | CompTIA recommends A+ certification and 9-12 months of networking experience. |
| Official Syllabus URL: | https://www.comptia.org/en/certifications/network/ |
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NEW QUESTION # 352
After running a Cat 8 cable using passthrough plugs, an electrician notices that connected cables are experiencing a lot of cross talk. Which of the following troubleshooting steps should the electrician take first?
Answer: B
Explanation:
Cross talk can often be caused by improper termination of cables. The first step in troubleshooting should be to inspect the connectors for any wires that might be touching or exposed. Ensuring that all wires are correctly seated and that no conductors are exposed can help reduce or eliminate cross talk. This step should be taken before attempting to re-terminate the connections or check for other sources of interference.
Reference: CompTIA Network+ study materials.
NEW QUESTION # 353
Which of the following most likely requires the use of subinterfaces?
Answer: C
Explanation:
Introduction to Subinterfaces:
Subinterfaces are logical interfaces created on a single physical interface. They are used to enable a router to support multiple networks on a single physical interface.
Use Case for Subinterfaces:
Subinterfaces are commonly used in scenarios where VLANs are implemented. A router with a single physical LAN port can be configured with multiple subinterfaces, each associated with a different VLAN.
This setup allows the router to route traffic between different VLANs.
Example Configuration:
Consider a router with a single physical interface GigabitEthernet0/0 and two VLANs, 10 and 20.
interface GigabitEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255.255.255.0
!
interface GigabitEthernet0/0.20
encapsulation dot1Q 20
ip address 192.168.20.1 255.255.255.0
The encapsulation dot1Q command specifies the VLAN ID.
Explanation of the Options:
A: A router with only one available LAN port: This is correct. Subinterfaces allow a single physical interface to manage multiple networks, making it essential for routers with limited physical interfaces.
B: A firewall performing deep packet inspection: Firewalls can use subinterfaces, but it is not a requirement for deep packet inspection.
C: A hub utilizing jumbo frames: Hubs do not use subinterfaces as they operate at Layer 1 and do not manage IP addressing.
D: A switch using Spanning Tree Protocol: STP is a protocol for preventing loops in a network and does not require subinterfaces.
Conclusion:
Subinterfaces provide a practical solution for routing between multiple VLANs on a router with limited physical interfaces. They allow network administrators to optimize the use of available hardware resources efficiently.
References:
CompTIA Network+ guide detailing VLAN configurations and the use of subinterfaces (see page #Ref9 Basic Configuration Commands).
NEW QUESTION # 354
A network technician wants to reduce switch port use. The technician connects users' laptops through VoIP phones. However, this change causes users to have issues printing and accessing different network resources.
Which of the following is the most likely cause of this issue?
Answer: A
Explanation:
The most likely cause is an incorrect VLAN assignment. VoIP phones commonly support a pass-through Ethernet port that allows a user's computer to connect through the phone to the switch. In this design, the phone is usually placed in a voice VLAN, while the connected computer should remain in the appropriate data VLAN. If the switch port, phone, or VLAN tagging configuration is incorrect, the laptop may be placed into the wrong VLAN. This can prevent access to printers, file shares, application servers, or other network resources.
The CompTIA Network+ N10-009 objectives include VLANs, switching, VoIP, QoS, and network segmentation. Voice and data VLAN separation is common because voice traffic often requires prioritization and different security or DHCP options. Proper configuration may involve access VLANs, voice VLANs,
802.1Q tagging, LLDP-MED, and DHCP scopes.
An incorrect subnet mask could cause reachability issues, but the problem began after connecting laptops through VoIP phones, making VLAN assignment more likely. Address pool exhaustion would prevent clients from receiving addresses. Duplicate IP addresses would usually produce conflict symptoms. The best answer is VLAN assignment.
NEW QUESTION # 355
Which of the following objectives does an evil twin achieve?
Answer: A
Explanation:
An evil twin attack is when an attacker sets up a rogue access point (AP) with the same SSID as a legitimate one to trick users into connecting. Once users connect, attackers often present fake login pages or capture unencrypted session data to steal login credentials.
A). DNS poisoning manipulates DNS resolution but is not inherent to evil twin.
C). ARP spoofing is a Layer 2 attack involving MAC/IP mapping manipulation.
D). Denial of service can be a side effect but is not the primary objective of evil twin attacks.
The main purpose of an evil twin is credential theft, enabling further unauthorized access to networks or systems.
References (CompTIA Network+ N10-009):
Domain: Network Security - Wireless attacks, rogue APs, evil twins.
NEW QUESTION # 356
A network technician is adding a security camera with an enhancer to a network closet in an organization's office building that has six APs. When plugged in, the camera does not respond.
Given the following information:
- Switch: 24 ports, 124W PoE capable, maximum 16W per port
- AP: 12W PoE
- Camera: 14W
- Enhancer: 4W
Which of the following is the most likely reason the camera is not working?
Answer: D
Explanation:
The camera and enhancer require 18W on the same connection, but the switch supports a maximum of 16W per port. Since the single port cannot supply enough power, the camera does not respond.
NEW QUESTION # 357
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