Module 3: Network Operations and Troubleshooting
Week of Tue, Oct 27 · module closes Sun, Nov 8
Take Meerk's quiz for Module 3
This module's items
- M3 Quizpoints in Canvas
- M3 Labpoints in Canvas
Exact due times are in Canvas.
Know these cold
- Network troubleshooting tools: ping (ICMP echo, tests reachability), traceroute/tracert (shows hop-by-hop path), nslookup/dig (DNS queries), netstat (active connections).
- Common issues: wrong IP/subnet (check with ipconfig), duplicate IPs (ARP conflict), DNS failure (nslookup the domain), DHCP exhaustion (check lease table).
- Network monitoring: SNMP collects device metrics, syslog aggregates log messages, NetFlow analyzes traffic patterns.
- High availability: redundant ISP links, failover routing (HSRP/VRRP), UPS for power protection.
- Network documentation: logical diagrams show IP addressing; physical diagrams show cable runs and port assignments.
Meerk's quiz — open the Module 3 gate
10 questions, no time limit. 85% on your first attempt in a 24-hour window opens the gate. Retakes inside the window are practice — they help you learn, they don't count. Work alone; the point is to know it, not to have seen it.
Stuck?
Raise your hand. Mr. James gets a message right away and can help you remotely. Nothing else is stored — just your last name, grade, and where you're stuck.
Dinner Table Question
Ask at home: Why do businesses need backup internet connections?
En español: ¿Por qué las empresas necesitan conexiones a Internet de respaldo?