Legacy Haven University

Category: Network+ (N10-009)

The CompTIA Network+ (N10-009) certification establishes the essential baseline knowledge required to deploy and support enterprise-grade network environments. In modern IT ecosystems, engineers must seamlessly bridge physical infrastructure with software-defined networking, cloud interconnects, and zero-trust security postures.

This category provides clear, domain-aligned educational content and technical walkthroughs tailored to both aspiring network administrators and candidates preparing for the N10-009 examination. Explore step-by-step subnetting guides, protocol comparisons, routing and switching configurations, command-line troubleshooting workflows, and performance-based question (PBQ) review scenarios.

  • CAS-005 Lab: Zero-Trust Microsegmentation

    The data-center network is flat — any host can reach any other. Apply zero-trust microsegmentation with nftables: set the forwarding policy to drop, allow only the required tier-to-tier flows, and prove a web host can no longer reach the database directly.

  • CAS-005 Lab: Tracking Malicious Cron Jobs & Backdoors on Linux

    A server keeps beaconing out even after reboots. Hunt the persistence: enumerate every cron source, find the hidden @reboot job that launches a reverse shell, trace and remove the backdoor binary, and delete the malicious cron entry — cleanly, without destroying evidence.

  • Linux Forensic Investigation: Analyzing Compromised Servers and Rootkits

    Linux forensic investigation of a compromised server starts with volatile memory, then host artifacts, rootkit hiding methods, and a timeline that supports root-cause analysis under CompTIA SecurityX CAS-005.

  • 220-1202 Lab: Mapping Network Drives & Printer Shares

    A new hire needs the Finance share mapped to drive Z: every time they log on. Browse the file server’s shares, map a persistent network drive with net use, and verify it — plus learn UNC paths.

  • OS Network Settings: IPConfig, DNS, and File Sharing

    Windows will not tell you why a user cannot reach a share or why a name will not resolve until you inspect the stack yourself. You open an elevated Command Prompt, you run ipconfig /all, you read the DHCP lease and the DNS servers, and you map the share with net use.

  • 220-1201 Lab: Spec’ing & Building a Virtual CAD Workstation

    An engineer needs a workstation for heavy 3D CAD. Spec the right parts — the ones a CAD build actually needs — then map each demanding workload to the component that matters most for it.

  • Custom PC Configurations for A+ 220-1201: Gaming, Audio, and CAD Workstations

    A technician who cannot match CPU cores, RAM channels, GPU class, storage interface, PSU wattage, and cooling to a workload fails the hardware scenario on CompTIA A+ Core 1 (220-1201).

  • N10-009 Lab: Configuring a VPC Peering Connection

    Two VPCs need to talk privately. Request a peering connection from prod (vpc-aaa) to data (vpc-bbb), accept it, and add the routes on both sides — then learn why peering is non-transitive.

  • Cloud Networking: VPCs, Peering, and SD-WAN

    Cloud networks solve a hard problem: how do you build isolated, scalable, and controllable networks when the hardware lives in someone else’s data center?

  • SY0-701 Lab: WAF & Rate Limiting at the Edge

    The login endpoint is being hit by credential-stuffing and an app-layer flood, and a SQLi probe slipped through. Add nginx rate limiting and enable the ModSecurity/OWASP CRS engine, validate, reload, and prove requests get throttled (429) and injection is blocked (403).