CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 451:

  Which of the following protocol ports should be used to securely transfer a file?

  A. 22
  B. 69
  C. 80
  D. 3389
  A. 22

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  Explanation

  Port 22 is used for SFTP (Secure File Transfer Protocol) and SCP (Secure Copy Protocol), which encrypt file transfers using SSH (Secure Shell). This ensures data is transmitted securely over the network.

  Why not the other options?

  Port 69 (B) - TFTP (Trivial File Transfer Protocol): Transfers files but is not secure (no encryption).

  Port 80 (C) - HTTP: Used for web traffic, not for file transfer.

  Port 3389 (D) - RDP (Remote Desktop Protocol): Used for remote desktop access, not file transfer.

• Question 452:

  An investment bank is seeking a DR backup solution.

  Which of the following provides the most cost-effective backup site?

  A. Hot
  B. Cold
  C. Cluster
  D. Warm
  B. Cold

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  Explanation

  Cold sites are the most cost-effective disaster recovery (DR) option since they require the least infrastructure investment. They provide space and power but no pre-configured systems.

  Hot sites (A) are fully operational and very expensive.

  Warm sites (D) offer some pre-configured hardware but still require setup, making them more costly than cold sites.

  Clusters (C) are active failover systems, not DR sites.

  References:

  CompTIA Network+ N10-009 Official Documentation?Disaster Recovery&

  Business Continuity Planning.

• Question 453:

  A network engineer is configuring redundant links between switches and wants to prevent switching loops.

  Which protocol should be enabled?

  A. 802.1Q
  B. STP
  C. Flow control
  D. CSMA/CD
  B. STP

• Question 454:

  A storage network requires reduced overhead and increased efficiency for the amout of data being sent.

  Which of the following should an engineer likely configure to meet these requirements?

  A. Link speed
  B. Jumbo frames
  C. QoS
  D. 802.1q tagging
  B. Jumbo frames

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  Explanation

  Jumbo frames are Ethernet frames with a payload greater than the standard maximum transmission unit (MTU) of 1500 bytes. Configuring jumbo frames can reduce overhead and increase efficiency in storage networks by allowing more data to be sent in each frame, thus reducing the number of frames needed to transmit the same amount of data.

  Reduced Overhead: By sending larger frames, the relative overhead for headers and acknowledgments is reduced.

  Increased Efficiency: Larger frames mean fewer packets to process, leading to better utilization of network bandwidth and improved performance in high-throughput environments like storage networks.

  Configuration: Requires support from all devices in the network path, including switches and network interface cards (NICs).

  References:

  CompTIA Network+ N10-007 Official Certification Guide: Explains jumbo frames and their benefits in reducing network overhead.

  Cisco Networking Academy: Provides training on network optimization techniques, including the use of jumbo frames.

  Network+ Certification All-in-One Exam Guide: Covers advanced Ethernet features, including jumbo frames and their configuration for improved network performance.

• Question 455:

  A network architect of a stock exchange broker is implementing a disaster recovery (DR) high-availability plan.

  Which of the following approaches would be the best fit?

  A. Warm site
  B. Active-active
  C. Full mesh
  D. In-band
  B. Active-active

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  Explanation

  In financial institutions such as stock exchanges, downtime or latency can have severe consequences. Active-active high availability ensures multiple sites/systems are running simultaneously, distributing the load and providing immediate failover with minimal or no interruption. This is the best approach for environments that require continuous uptime and resiliency.

  Option A: Warm site: Useful for disaster recovery, but not immediate; systems must be partially configured and brought online.

  Option C: Full mesh: Refers to topology interconnections, not DR/HA design.

  Option D:

  In-band: Relates to management methods, not HA/DR strategies.

  References:

  Domain: Network Infrastructure -- High availability, redundancy strategies, active-active vs. active-passive design.

• Question 456:

  Which of the following is a use case for a PaaS environment?

  A. Mobile access
  B. E-commerce site
  C. Application development
  D. Cloud-native software
  C. Application development

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  Explanation

  PaaS (Platform as a Service) is best suited for application development because it provides a managed platform that includes the runtime environment, development frameworks, middleware, databases (often), and build/deployment tooling.

  In a PaaS model, the cloud provider manages the underlying infrastructure (servers, storage, networking, OS patching, and often the application runtime), allowing developers to focus on writing code, testing, and releasing applications quickly. This aligns with Network+ cloud concepts where service models are compared by responsibility: PaaS reduces operational overhead for the customer and accelerates development through standardized environments and automation.

  Mobile access is a use case for remote access solutions (VPN, zero trust access, MDM), not specifically PaaS. An e-commerce site could be hosted using many models (IaaS, PaaS, SaaS), so it's not the most specific match. Cloud-native software describes an architectural style (microservices, containers, managed services) and can be built using PaaS components, but it is broader than a single "use case" and is not as directly tied to the PaaS definition as application development is. Therefore, application development is the clearest and most accurate PaaS use case.

• Question 457:

  A user reports issues accessing a file server on a LAN with the IP address 192.168.50.140 at a large facility with incomplete infrastructure documentation.

  The following are the results of the ping command:

  ping -c 10 192.168.50.140

  Packets: Sent = 10, Received = 5, Lost = 5 (50% loss)

  Round-trip times: Minimum = 3ms, Maximum = 144ms, Average = 42ms

  Which of the following should a technician do next to continue troubleshooting the issue with minimal impact?

  A. Perform toning and probe
  B. Replace the cable.
  C. Visually locate the fault.
  D. Restart the switch.
  A. Perform toning and probe

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  Explanation

  The symptoms show intermittent connectivity with high packet loss and variable latency, which strongly indicates a Layer 1 issue such as a damaged cable or poor physical connection.

  According to CompTIA Network+ N10-009 troubleshooting methodology, the technician should take the most direct and minimally disruptive action that addresses the likely cause.

  Replacing the cable is a low-impact, fast, and effective step to validate a physical layer fault.

  Performing toning and probe is primarily used to identify cable paths in unknown infrastructure, but it does not resolve the connectivity issue itself and is not the most direct next step.

  Visually locating the fault is unreliable and may not reveal internal cable damage. Restarting the switch is highly disruptive and should not be performed at this stage.

  Therefore, replacing the cable is the most appropriate next action.

• Question 458:

  A network administrator is troubleshooting issues with a DHCP server at a university. More students have recently arrived on campus, and the users are unable to obtain an IP address.

  Which of the following should the administrator do to address the issue?

  A. Enable IP helper.
  B. Change the subnet mask.
  C. Increase the scope size.
  D. Add address exclusions.
  C. Increase the scope size.

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  Explanation

  The issue is that more students have arrived on campus, meaning the available IP addresses are exhausted. To fix this, the administrator should increase the DHCP scope size to allow more devices to obtain IP addresses.

  Breakdown of Options:

  Option

  A. Enable IP helper - IP helper is used to forward DHCP requests across different subnets. However, the problem here is that the DHCP scope is full, not that requests are not reaching the server. Option

  B. Change the subnet mask - The subnet mask determines the number of available hosts, butchanging it without increasing the IP pool does not help.

  Option C. Increase the scope size - Correct answer. Expanding the DHCP scope provides more IP addresses for assignment.

  Option D. Add address exclusions - Exclusions reserve IP addresses, which would further reduce available addresses instead of solving the issue.

• Question 459:

  A network engineer is completing a new VoIP installation, but the phones cannot find the TFTP server to download the configuration files.

  Which of the following DHCP features would help the phone reach the TFTP server?

  A. Exclusions
  B. Lease time
  C. Options
  D. Scope
  C. Options

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  Explanation

  DHCP Options: DHCP options allow additional configuration parameters, such as the address of a TFTP server, to be provided to clients during the DHCP lease process. This is essential for VoIP phones to locate the server for configuration files.

  Exclusions (A): Prevents certain IP addresses from being assigned by DHCP but does not direct devices to servers.

  Lease time (B): Determines how long an IP address is assigned but does not impact TFTP settings.

  Scope (D): Defines a range of IP addresses but does not include additional server information.

• Question 460:

  Which of the following routing protocols is most commonly used to interconnect WANs?

  A. IGP
  B. EIGRP
  C. BGP
  D. OSPF
  C. BGP

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  Explanation

  Border Gateway Protocol (BGP): BGP is the most commonly used routing protocol for interconnecting WANs, especially across the internet. It is used for exchanging routing information between autonomous systems (AS), making it the backbone protocol for large-scale WANs.

  IGP (A): Interior Gateway Protocols like OSPF and EIGRP are typically used within a single AS, not between them.

  EIGRP (B): While it is efficient, EIGRP is primarily used for intra-domain routing and not ideal for WAN interconnection.

  OSPF (D): While OSPF can be used for WANs, it is not as common as BGP for inter-AS communication.