CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 541:

  Which of the following technologies are X.

  509 certificates most commonly associated with?

  A. PKI
  B. VLAN tagging
  C. LDAP
  D. MFA
  A. PKI

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  Explanation

  X.509 certificates are most commonly associated with Public Key Infrastructure (PKI). These certificates are used for a variety of security functions, including digital signatures, encryption, and authentication.

  PKI: X.509 certificates are a fundamental component of PKI, used to manage encryption keys and authenticate users and devices.

  Digital Certificates: They are used to establish secure communications over networks, such as SSL/TLS for websites and secure email communication.

  Authentication and Encryption: X.509 certificates provide the means to securely exchange keys and verify identities in various applications, ensuring data integrity and confidentiality.

  References:

  CompTIA Network+ N10-007 Official Certification Guide: Covers PKI and the role of X.509 certificates in network security.

  Cisco Networking Academy: Provides training on PKI, certificates, and secure communications.

  Network+ Certification All-in-One Exam Guide: Explains PKI, X.509 certificates, and their applications in securing network communications.

• Question 542:

  A data center interconnect using a VXLAN was recently implemented. A network engineer observes slow performance and fragmentation on the interconnect.

  Which of the following technologies will resolve the issue?

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

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  Explanation

  VXLAN (Virtual Extensible LAN) encapsulates Ethernet frames inside UDP packets, increasing packet size. This can lead to fragmentation and performance degradation unless Jumbo Frames are enabled.

  Breakdown of Options:

  Option A. 802.1Q tagging?VLAN tagging enables segmentation but does not address fragmentation issues.

  Option B. Spanning tree?STP prevents loops but does not improve performance for VXLAN traffic.

  Option C. Link aggregation?LACP combines links for higher bandwidth but does not prevent fragmentation.

  Option D. Jumbo frames?Correct answer. Enabling Jumbo Frames allows larger packet sizes, reducing fragmentation and improving VXLAN performance.

• Question 543:

  A network architect needs to create a wireless field network to provide reliable service to public safety vehicles.

  Which of the following types of networks is the best solution?

  A. Mesh
  B. Ad hoc
  C. Point-to-point
  D. Infrastructure
  A. Mesh

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  Explanation

  A mesh network is the best solution for providing reliable wireless service to public safety vehicles. In a mesh network, each node (vehicle) can connect to multiple other nodes, providing multiple paths for data to travel. This enhances reliability and redundancy, ensuring continuous connectivity even if one or more nodes fail. Mesh networks are highly resilient and are well-suited for dynamic and mobile environments such as public safety operations.

  References:

  CompTIA Network+ study materials.

• Question 544:

  Which of the following is a characteristic of IPv6?

  A. 32-bit addressing
  B. Uses NAT by default
  C. 128-bit addressing
  D. Limited address space
  C. 128-bit addressing

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  Explanation

  IPv6 uses 128-bit addressing, providing a significantly larger address space compared to IPv4's 32-bit addressing. This expansion allows for an almost unlimited number of unique IP addresses, eliminating the need for NAT in most cases.

  IPv6 also includes features such as simplified header structure and improved support for security. It was developed to address the limitations and exhaustion of IPv4 address space.

• Question 545:

  Two branch offices need:

  Secure communication over the internet Full access to internal resources Always-on connection

  Which solution should be implemented?

  A. Client-to-site VPN
  B. Site-to-site VPN
  C. SSL VPN
  D. Split tunnel VPN
  B. Site-to-site VPN

• Question 546:

  An IT department is considering implementing a SIEM solution to improve network security. The department wants to ensure that the SIEM system is able to ingest and analyze logs from all of the company's core devices.

  Which of the following is the most important consideration when selecting a SIEM solution?

  A. Easy to manage
  B. Cost
  C. Compatibility
  D. Features
  C. Compatibility

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  Explanation

  The correct answer is C. Compatibility. A SIEM is only effective if it can successfully collect, normalize, and analyze data from the systems the organization relies on. Since the question specifically says the department wants the SIEM to ingest and analyze logs from all core devices, the most important factor is whether the SIEM is compatible with those devices, their log formats, and their supported methods of exporting events.

  This includes support for common logging methods such as syslog, SNMP traps, API integrations, agent-based collection, and vendor-specific event formats. Even a SIEM with excellent features will not deliver value if it cannot properly receive and interpret logs from firewalls, routers, switches, servers, and security appliances already in use.

  The other choices matter, but they come after compatibility. Ease of management is helpful for daily operations. Cost is always a practical concern. Features can improve visibility and automation. However, none of those benefits matter much if the SIEM cannot integrate with the organization's actual environment.

  For Network+ exam purposes, when log ingestion across many device types is the requirement, the top selection criterion is compatibility. Without that foundation, correlation, alerting, and security analysis will be incomplete.

• Question 547:

  A laptop user gets an error when trying to access the company's intranet site.

  A technician runs ipconfig /all with the following results:

  Autoconfiguration IPv4 Address: 169.254.0.5 (Preferred) Subnet Mask: 255.255.0.0

  Default Gateway: _______ DHCP Server: _______

  Which of the following is most likely causing the issue?

  A. Short DHCP lease duration
  B. IIS server malfunction
  C. Address pool exhaustion
  D. IDS misconfiguration
  C. Address pool exhaustion

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  Explanation

  The giveaway here is the 169.254.x.x address. That is an APIPA address, which Windows assigns to itself when it asks for an IP address from DHCP and does not get one. Since there is also no default gateway and no DHCP server listed, the laptop clearly failed to obtain normal network settings.

  Out of the choices, address pool exhaustion makes the most sense. If the DHCP scope has run out of available addresses, the client cannot lease one, so it falls back to an automatic private address. At that point, the device may still think its network adapter is working, but it will not be able to reach internal resources like the company intranet because it does not have valid Layer 3 settings for that network.

  The other answers do not fit the output. A short lease duration could cause frequent renewals, but it would not normally explain an APIPA address by itself. An IIS problem would affect the web server, not the client's local IP configuration. An IDS issue also would not cause the workstation to self-assign 169.254.0.5. This is a DHCP addressing problem, and the best answer is. C

• Question 548:

  A network technician sets up a computer on the accounting department floor for a user from the marketing department. The user reports that they cannot access the marketing department's shared drives but can access the internet.

  Which of the following is the most likely cause of this issue?

  A. Mismatched switchport duplex
  B. Misconfigured gateway settings
  C. Incorrect VLAN assignment
  D. SVI is assigned to the wrong IP address
  C. Incorrect VLAN assignment

• Question 549:

  Which of the following concepts describes the idea of housing different customers in the same public cloud data center?

  A. Elasticity
  B. Hybrid cloud
  C. Scalability
  D. Multitenancy
  D. Multitenancy

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  Explanation

  Multitenancy is a cloud concept where multiple customers share the same physical resources (servers, storage, and networks) but remain logically separated for security and privacy.

  Option A: Elasticity is auto-scaling resources.

  Option B: Hybrid cloud combines private and public resources.

  Option C: Scalability is the ability to grow resources but doesn't imply multiple customers.

  References:

  Domain: Networking Concepts -- Cloud computing models, multitenancy in public cloud.

• Question 550:

  An organization has four departments that each need access to different resources that do not overlap.

  Which of the following should a technician configure in order to implement and assign an ACL?

  A. VLAN
  B. DHCP
  C. VPN
  D. STP
  A. VLAN

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  Explanation

  VLANs (Virtual Local Area Networks)segment network trafficby department, allowingACLs (Access Control Lists) to be applied based on VLAN membership, improving security and resource isolation.

  Breakdown of Options:

  Option

  A. VLAN - Correct answer. VLANs enable logical network segmentation, allowing ACLs per department Option

  B. DHCP - Assigns IP addresses but does not control access Option

  C. VPN - Provides remote access not segmentation within a network Option

  D. STP - Prevents switching loops not related to ACL implementation