CompTIA N10-009 Online Practice Questions and Exam Preparation

CompTIA N10-009 Online Questions & Answers

• Question 291:

  A company is hosting a secure that requires all connections to the server to be encrypted. A junior administrator needs to harded the web server. The following ports on the web server. The following ports on the web server are open:

  

  Which of the following ports should be disabled?

  A. 22
  B. 80
  C. 443
  D. 587
  B. 80

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  Explanation

  For a web server that requires all connections to be encrypted, port 80 (HTTP) should be disabled. Port 80 is used for unencrypted web traffic, whereas port 443 is used for HTTPS, which provides encrypted communication. Port 80 (HTTP): This port is used for unsecured web traffic. Disabling this port ensures that all web traffic must use HTTPS, which encrypts the data in transit. Port 443 (HTTPS): This port is used for secure web traffic via SSL/TLS encryption. Keeping this port open ensures that secure connections can be made to the web server.

  Other Ports:

  References:

  CompTIA Network+ N10-007 Official Certification Guide: Discusses the roles and security implications of various ports and protocols. Cisco Networking Academy: Provides training on secure web server configuration and port management.

  Network+ Certification All-in-One Exam Guide: Covers port security and best practices for securing web servers.

• Question 292:

  Which of the following is the best networking appliance for interconnecting multiple logical networks and forwarding data packets between them while minimizing latency?

  A. Firewall
  B. Router
  C. Layer 2 switch
  D. Load balancer
  B. Router

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  Explanation

  The correct appliance is a router, which is specifically designed to interconnect multiple networks and forward packets based on IP addresses. Routers operate at Layer 3 (Network layer) of the OSI model and make intelligent forwarding decisions to ensure data reaches the correct destination network.

  Option A: Firewall can also forward traffic, but its primary function is security, not routing efficiency.

  Option C: Layer 2 switches connect devices within the same LAN but do not forward packets between different networks without routing capability.

  Option D: Load balancers distribute traffic among servers but are not general-purpose routers.

  Modern enterprise routers are optimized to minimize latency by using fast switching and hardware acceleration, making them ideal for interconnecting logical networks securely and efficiently.

  References:

  Domain: Network Infrastructure -- Routers, Layer 3 devices, inter-network communication.

• Question 293:

  Which of the following routing protocols uses an autonomous system number?

  A. IS-IS
  B. EIGRP
  C. OSPF
  D. BGP
  D. BGP

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  Explanation

  BGP (Border Gateway Protocol) uses an Autonomous System (AS) number for its operations. An AS is a collection of IP networks and routers under the control of a single organization that presents a common routing policy to the Internet.

  BGP is used to exchange routing information between different ASes on the Internet, making it the only protocol among the listed options that uses an AS number.

  References:

  CompTIA Network+ study materials and RFC 4271.

• Question 294:

  Which of the following is the best reason to create a golden configuration?

  A. To provide configuration consistency
  B. To decrease the size of configuration files
  C. To increase security by encrypting configurations
  D. To set up backup configurations for each device
  A. To provide configuration consistency

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  Explanation

  A golden configuration is a baseline configuration file that contains approved, standardized settings for network devices. The purpose is to ensure configuration consistency across the environment. This prevents misconfigurations, supports compliance with organizational or regulatory standards, and accelerates recovery if a device needs reconfiguration.

  Option B: Reducing file size is not the goal of golden configs.

  Option C: Golden configs can include security settings, but they are not inherently encrypted -- they are simply a baseline template.

  Option D:. While configs can be backed up, golden configs are more about standardization, not device-specific backups.

  By maintaining a golden configuration, administrators can quickly detect unauthorized changes (by comparing running configs against the golden file) and enforce consistency across devices. This improves network stability, reduces troubleshooting complexity, and enhances security posture.

  References:

  Domain: Network Operations -- Configuration management, golden images/configurations.

• Question 295:

  Which of the following protocols provides remote access utilizing port 22?

  A. SSH
  B. Telnet
  C. TLS
  D. RDP
  A. SSH

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  Explanation

  SSH (Secure Shell) is a protocol used to securely connect to a remote server/system over a network. It operates on port 22 and provides encrypted communication, unlike Telnet which operates on port 23 and is not secure. TLS is used for securing HTTP connections (HTTPS) and operates on ports like 443, while RDP (Remote Desktop Protocol) is used for remote desktop connections and operates on port 3389.

  References:

  The CompTIA Network+ materials and tutorials cover SSH as the standard protocol for secure remote access, highlighting its operation on port 22.

• Question 296:

  A new device cannot connect after replacing an old one.

  What is the MOST likely cause?

  A. Port security
  B. VLAN tagging
  C. Port aggregation
  D. Port mirroring
  A. Port security

• Question 297:

  Which of the following network topologies contains a direct connection between every node in the network?

  A. Mesh
  B. Hub-and-spoke
  C. Star
  D. Point-to-point
  A. Mesh

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  Explanation

  In a mesh topology, every node is directly connected to every other node. This provides high redundancy and reliability, as there are multiple paths for data to travel between nodes. This topology is often used in networks where high availability is crucial.

  References:

  CompTIA Network+ study materials.

• Question 298:

  Which of the following would be violated if an employee accidentally deleted a customer's data?

  A. Integrity
  B. Confidentiality
  C. Vulnerability
  D. Availability
  D. Availability

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  Explanation

  Availability refers to ensuring that data is accessible when needed. If a customer's data is accidentally deleted, it impacts availability, as the data can no longer be accessed.

• Question 299:

  Which of the following wireless standards operates in the 5GHz band?

  A. 802.11b
  B. 802.11g
  C. 802.11n
  D. 802.11ac
  D. 802.11ac

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  Explanation

  802.11ac operates exclusively in the 5GHz frequency band and provides higher throughput, reduced interference, and improved performance compared to earlier standards. 802.11b and 802.11g operate in the 2.4GHz band, while 802.11n can operate in both 2.4GHz and 5GHz. The 5GHz band offers more channels and less congestion, making 802.11ac suitable for high-density environments.

• Question 300:

  A technician runs the following command:

  show interface Gi1/0/5

  Input errors: 1500

  CRC errors: 1200

  Collisions: 0

  Users report intermittent connectivity.

  What is the MOST likely cause?

  A. Duplex mismatch
  B. Bad cable
  C. Broadcast storm
  D. VLAN mismatch
  B. Bad cable