CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 31:

  Which of the following best describes the purpose of a default gateway?

  A. Resolves domain names to IP addresses
  B. Connects devices within the same subnet
  C. Routes traffic to external networks
  D. Assigns IP addresses dynamically
  C. Routes traffic to external networks

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  Explanation

  A default gateway is the network device, typically a router, that forwards traffic from a local subnet to external networks when the destination is outside the local network. When a host determines that a destination IP address is not within its own subnet, it sends the packet to the default gateway for routing. DNS resolves names to IP addresses, DHCP assigns IP configurations, and switches handle local subnet communication. Without a properly configured default gateway, devices would be unable to communicate beyond their local network segment.

• Question 32:

  A systems administrator is configuring a new device to be added to the network. The administrator is planning to perform device hardening prior to connecting the device.

  Which of the following should the administrator do first?

  A. Update the network ACLs.
  B. Place the device in a screened subnet.
  C. Enable content filtering.
  D. Change the default admin passwords.
  D. Change the default admin passwords.

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  Explanation

  Changing default admin passwords is a fundamental first step in device hardening to prevent unauthorized access.

• Question 33:

  After a networking intern plugged in a switch, a significant number of users in a building lost connectivity.

  Which of the following is the most likely root cause?

  A. VTP update
  B. Port security issue
  C. LLDP misconfiguration
  D. Native VLAN mismatch
  D. Native VLAN mismatch

• Question 34:

  A user connects to a corporate VPN via a web browser and is able to use TLS to access the internal financial system to input a time card.

  Which of the following best describes how the VPN is being used?

  A. Clientless
  B. Client-to-site
  C. Full tunnel
  D. Site-to-site
  A. Clientless

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  Explanation

  References:

  CompTIA Network+ Certification Exam Objectives - Remote Access Methods section.

• Question 35:

  A network administrator is planning to host a company application in the cloud, making the application available for all internal and third-party users.

  Which of the following concepts describes this arrangement?

  A. Multitenancy
  B. VPC
  C. NFV
  D. SaaS
  A. Multitenancy

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  Explanation

  Multitenancy is a cloud computing architecture where a single instance of software serves multiple customers or tenants. Each tenant's data is isolated and remains invisible to other tenants. Hosting a company application in the cloud to be available for both internal and third-party users fits this concept, as it allows shared resources and infrastructure while maintaining data separation and security.

  References:

  CompTIA Network+ Exam Objectives and official study guides.

• Question 36:

  Which of the following attacks can be effectively protected against by using techniques to check if a connection was made by a human user? (Choose two.)

  A. Brute-force
  B. Dictionary
  C. On-path attack
  D. Phishing
  E. Shoulder surfing
  F. Evil twin
  A. Brute-force
  B. Dictionary

• Question 37:

  A network administrator's device is experiencing severe Wi-Fi interference within the corporate headquarters causing the device to constantly drop off the network.

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

  A. Too much wireless reflection
  B. Too much wireless absorption
  C. Too many wireless repeaters
  D. Too many client connections
  A. Too much wireless reflection

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  Explanation

  References:

  CompTIA Network+ Certification Exam Objectives - Wireless Networks section.

• Question 38:

  A customer needs six usable IP addresses.

  Which of the following best meets this requirement?

  A. 255.255.255.128
  B. 255.255.255.192
  C. 255.255.255.224
  D. 255.255.255.240
  D. 255.255.255.240

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  Explanation

  References:

  CompTIA Network+ Certification Exam Objectives - IP Addressing section.

• Question 39:

  Which of the following provides simple authentication to access network devices while also providing logging capabilities?

  A. TACACS+
  B. SAML
  C. SSO
  D. MFA
  A. TACACS+

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  Explanation

  The correct answer is A. TACACS+. This protocol is commonly used for authentication, authorization, and accounting (AAA) when administrators need to access network infrastructure devices such as routers, switches, and firewalls. The key part of the question is not just authentication, but also logging capabilities. TACACS+ supports accounting functions, which means it can record administrative actions and login events. That makes it especially useful when organizations want traceability for device access and configuration changes.

  The other options do not fit as well. SAML is primarily used for federated identity and web-based authentication between identity providers and service providers. SSO is a general authentication convenience feature that allows one login to access multiple systems, but it does not itself provide detailed device-level accounting. MFA strengthens authentication by requiring multiple factors, but it is not the protocol best known for centralized access control and activity logging on network devices.

  For Network+ exam purposes, TACACS+ is strongly associated with administrative access to network equipment and with maintaining an audit trail of who accessed devices and what actions were performed. Because the question asks for both simple authentication and logging, TACACS+ is the best match.

• Question 40:

  A major natural disaster strikes a company's headquarters, causing significant destruction and data loss. The company needs to quickly recover and resume operations.

  Which of the following will a network administrator need to do first?

  A. Conduct a damage assessment
  B. Migrate to the cold site
  C. Notify customers of the disaster
  D. Establish a communication plan
  A. Conduct a damage assessment