TOOL 01 • NETWORKING

🌐 Visual Subnet & CIDR Calculator

Calculate network IDs, broadcast bounds, usable IP host ranges, and subnet masks. Visual bit-allocation breakdown helps you intuitively master CIDR notation.

Study Module 2 →

IP Address

Subnet Mask (CIDR Prefix)

Network ID:192.168.10.0

Broadcast Address:192.168.10.63

Usable Host Range:192.168.10.1 - 192.168.10.62

Usable Host Count:62 Hosts

Subnet Mask:255.255.255.192

Network Scope:RFC 1918 Private LAN

TOOL 02 • GAMIFIED CHALLENGE

⚡ 60-Second Subnet Challenge

Test your network calculation instincts under pressure! Answer as many subnetting questions as you can in 60 seconds. Earn your rank and share your scorecard.

⏱️ TIME: 60s

SCORE: 0 STREAK: 0 🔥

QUESTION 1 / SPEED ROUND

What is the Broadcast Address for 192.168.1.0/26?

TOOL 03 • AUTOMATION & LOGIC

🔄 Enterprise NOC Incident Runbook Simulator

Step through real production incident scenarios. See how Tier 1 and Tier 2 operations teams apply automated triage trees, health probes, and auto-remediation runbooks.

Study Module 3 →

Select Incident Scenario

HIGH CPU UTILIZATION — AUTOMATED RESPONSE RUNBOOK

DETECT: Monitoring agent reports CPU = 96% for 180 seconds. Alert fired.

CLASSIFY: Severity P2 assigned. On-call engineer notified via PagerDuty.

DIAGNOSE: Run top -b -n 1 | head -20 to identify runaway process PID.

ACTION: If known orphaned worker: graceful kill. If unknown: escalate to L2.

VERIFY: Confirm CPU drops below 80% within 3 minutes. Update ticket.

DOCUMENT: RCA logged in Jira. Incident closed. Post-mortem scheduled.

TOOL 04 • HARDWARE & ARCHITECTURE

⚡ CPU • Memory • Storage Instruction Pipeline

Visualize the nanosecond heartbeat of computer systems. Step through the instruction lifecycle from persistent storage to CPU ALU execution.

Study Module 1 →

1. NVMe Storage

~50-100 μs latency

→

2. DDR5 RAM

~60 ns latency

→

3. L2/L3 Cache

~1-10 ns latency

→

4. CPU Execution

Sub-nanosecond ALU

Stage 1: Instructions staged on NVMe drive, ready to be loaded into RAM.

TOOL 05 • CYBERSECURITY & GRC

🛡️ NIST Security Incident Response Lab

Work through NIST SP 800-61 aligned incident response runbooks for phishing attacks, ransomware containment, and data exfiltration triage.

Study Module 4 →

Select Security Scenario

PHISHING INCIDENT — NIST IR RESPONSE RUNBOOK

IDENTIFY: Email security gateway flags suspicious URL click from user account.

PROTECT: Account immediately disabled. Active sessions terminated. IT Security alerted.

DETECT: Review endpoint logs, browser history, and email header forensics for payload indicators...

RESPOND: Isolate endpoint from network. Run AV scan. Capture memory dump for forensics.

RECOVER: Re-image affected system. Restore from clean backup. Reset credentials with MFA enforced.

LESSONS: Add email domain to blocklist. Schedule phishing awareness training for team.

Free Hands-On IT Operations Labs & Simulators