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CompTIA Network+ Certification Exam Sample Questions (Q185-Q190):

NEW QUESTION # 185
Which of the following attacks would most likely cause duplicate IP addresses in a network?

A. Social engineering
B. Rogue DHCP server
C. DNS poisoning
D. Denial-of-service

Answer: B

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.
* Comparison with Other Attacks:
* DNS poisoning:Alters DNS records to redirect traffic to malicious sites, but does not cause IP address conflicts.
* Social engineering:Involves manipulating individuals to gain unauthorized access or information, not directly related to IP address conflicts.
* Denial-of-service (DoS):Floods a network or service with excessive traffic to disrupt operations, but does not cause duplicate IP addresses.
* Prevention and Detection:
* Implement network access control measures to prevent unauthorized devices from acting as DHCP servers.
* Use DHCP snooping on switches to allow DHCP responses only from authorized DHCP servers.
References:
* CompTIA Network+ study materials on network security threats and mitigation techniques.

NEW QUESTION # 186
An organization wants better network visibility. The organization's requirements include:
Multivendor/OS-monitoring capabilities
Real-time collection
Data correlation
Which of the following meets these requirements?

A. SNMP
B. Nmap
C. SIEM
D. Syslog

Answer: C

Explanation:
A Security Information and Event Management (SIEM) system collects, correlates, and analyzes logs from multiple sources in real-time, providing enhanced visibility across multivendor environments.
Breakdown of Options:
A: SNMP - SNMP is used for network device monitoring, but it lacks real-time correlation across multiple vendors.
B: SIEM - Correct answer. SIEM aggregates, analyzes, and correlates logs from multiple sources, providing real-time visibility.
C: Nmap - Nmap is a network scanning tool used for mapping hosts and detecting open ports but does not provide log correlation.
D: Syslog - Syslog collects logs but does not correlate or analyze them in real-time.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 3.3: Explain network security concepts.
NIST Special Publication 800-92: Guide to Computer Security Log Management

NEW QUESTION # 187
Users at an organization report that the wireless network is not working in some areas of the building. Users report that other wireless network SSIDs are visible when searching for the network, but the organization's network is not displayed. Which of the following is the most likely cause?

A. Client disassociation issues
B. Insufficient wireless coverage
C. Roaming misconfiguration
D. Interference or channel overlap

Answer: B

Explanation:
If the company's SSID is not visible in some areas while other networks are still visible, the most likely cause is insufficient wireless coverage. The wireless signal does not reach those areas, meaning additional access points or signal boosters may be required.
Breakdown of Options:
A: Interference or channel overlap - Would cause slow or unstable connections, but the SSID should still be visible.
B: Insufficient wireless coverage - # Correct answer. If the SSID is not appearing, the signal is too weak in that area.
C: Roaming misconfiguration - Would cause devices to stay on weaker APs instead of switching, but the SSID should still be visible.
D: Client disassociation issues - This would disconnect users, but they should still see the network.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.6: Explain wireless concepts and technologies.

NEW QUESTION # 188
Adata center interconnectusing aVXLANwas recently implemented. A network engineer observesslow performance and fragmentationon the interconnect. Which of the following technologies willresolve the issue?

A. 802.1Q tagging
B. Spanning tree
C. Link aggregation
D. Jumbo frames

Answer: D

Explanation:
Comprehensive and Detailed Explanation:
VXLAN (Virtual Extensible LAN)encapsulates Ethernet frames inside UDP packets, increasing packet size. This can lead tofragmentation and performance degradationunlessJumbo Framesare enabled.
Breakdown of Options:
* A. 802.1Q tagging- VLAN tagging enables segmentation but doesnot address fragmentation issues.
* B. Spanning tree- STP prevents loops but doesnot improve performancefor VXLAN traffic.
* C. Link aggregation- LACP combines links forhigher bandwidthbut doesnot prevent fragmentation
.
* D. Jumbo frames-Correct answer.EnablingJumbo Framesallows larger packet sizes,reducing fragmentationandimproving VXLAN performance.

NEW QUESTION # 189
A network engineer is now in charge of all SNMP management in the organization. The engineer must use a SNMP version that does not utilize plaintext dat a. Which of the following is the minimum version of SNMP that supports this requirement?

A. v2c
B. v1
C. v2u
D. v3

Answer: D

Explanation:
SNMPv3 is the version of the Simple Network Management Protocol that introduces security enhancements, including message integrity, authentication, and encryption. Unlike previous versions (v1 and v2c), SNMPv3 supports encrypted communication, ensuring that data is not transmitted in plaintext. This provides confidentiality and protects against eavesdropping and unauthorized access.
Reference: CompTIA Network+ study materials.

NEW QUESTION # 190
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