CompTIA Network+ N10-009 Exam Objectives Comprehensive Notes

About the Exam

  • Purpose: Certifies knowledge & skills in establishing connectivity, documentation, network services, monitoring, security, and infrastructure management.

  • Content:

    • Establish wired/wireless connectivity

    • Document & maintain network documentation

    • Configure common network services

    • Understand data-center, cloud, and virtual networking

    • Monitor activity & troubleshoot issues

    • Implement security techniques

    • Manage and troubleshoot infrastructure

  • Exam Development:

    • CompTIA collaborates with industry experts to set standards for IT skills.

    • Unauthorized study materials may lead to revocation of certification.

Test Details

  • Exam Number: N10-009

  • Number of Questions: Up to 90

  • Question Types: Multiple-choice and performance-based.

  • Duration: 90 minutes

  • Experience Level: 9–12 months in IT networking.

Exam Objectives (Domains)

  • Networking Concepts: 23%

  • Network Implementation: 20%

  • Network Operations: 19%

  • Network Security: 14%

  • Network Troubleshooting: 24%

1.0 Networking Concepts

1.1 OSI Model:

  • Layer Types: 1. Physical, 2. Data Link, 3. Network, 4. Transport, 5. Session, 6. Presentation, 7. Application.

1.2 Networking Appliances and Functions:

  • Devices: Router, Switch, Firewall, IDS/IPS, Load Balancer, Proxy, NAS, SAN.

  • Applications: CDN, VPN.

  • Functions: QoS, TTL.

1.3 Cloud Concepts:

  • Models: Public, Private, Hybrid; SaaS, IaaS, PaaS.

  • Terms: Scalability, Elasticity, Multitenancy.

1.4 Common Networking Protocols & Ports:

  • Protocols - Ports:

    • FTP (20/21)

    • SFTP/SSH (22)

    • Telnet (23)

    • SMTP (25)

    • DNS (53)

    • DHCP (67/68)

    • HTTP (80)

    • HTTPS (443)

  • Traffic Types: Unicast, Multicast, Anycast, Broadcast.

1.5 Transmission Media:

  • Types: Wired (Fiber, Coaxial, etc.), Wireless (802.11, Cellular).

  • Transceivers: Protocols, Form Factors.

1.6 Network Topologies:

  • Types: Star, Mesh, Point-to-Point, etc.

1.7 IPv4 Addressing:

  • Classes: A, B, C, D; CIDR, VLSM.

1.8 Modern Network Use Cases:

  • Technologies: Software-defined networks (SD-WAN), Zero Trust Architecture.

2.0 Network Implementation

Key Topics:

  • Routing Technologies: Static vs. Dynamic Routing (BGP, OSPF).

  • Switching Technologies: VLANs, Spanning Tree Protocol.

  • Wireless Technologies: SSID, Encryption methods (WPA2/WPA3).

  • Physical Installation Factors: Rack size, PDU, environmental factors.

3.0 Network Operations

General Responsibilities:

  • Documentation: Physical/logical diagrams, asset inventories, SLA understanding.

  • Monitoring tools: SNMP, traffic analysis, log aggregation.

4.0 Network Security

Core Concepts:

  • Security: Threats (DoS, Social Engineering), vulnerabilities

  • Authentication Methods: SSO, MFA, RADIUS.

  • Hardening Techniques: Disable unused ports, ACL, NAC.

5.0 Network Troubleshooting

Methodology:

  1. Identify the problem: Gather info, question users, identify symptoms.

  2. Establish theory of probable cause: Analyze approaches.

  3. Test theory and resolve or escalate.

  4. Document findings, actions, outcomes.

Common Issues:

  • Cabling Issues: Incorrect cable type, signal degradation, improper termination.

  • Performance Issues: Congestion, latency, packet loss.