Networking Domain¶
Domain guide: browse all networking content organized as a learning sequence.
Curated path through networking content in this repo.
Topic Pack¶
training/library/topics/networking/ - Complete topic pack with: - Primer - Mental model for networking layers - Street Ops - What breaks at 2am - Footguns - Common mistakes - Drills - Quick practice - Skillcheck - Score yourself
Incident Scenarios¶
| Scenario | Level | Topics |
|---|---|---|
| Asymmetric Routing | L2 | routing, firewalls |
| DNS Looks Fine but App Fails | L2 | DNS, TLS, nsswitch |
| MTU Blackhole | L2 | MTU, PMTUD |
| Duplex Mismatch | L1 | ethtool, NIC config |
| VLAN Trunk Mismatch | L2 | VLANs, Cisco |
Assessment¶
Key Tools¶
ip, ss, tcpdump, dig, mtr, ethtool, nmcli, traceroute, nmap
Pages that link here¶
- Networking - Street Ops
- Networking Drills
- Networking Fundamentals
- Scenario: Asymmetric Routing Through a Stateful Firewall
- Scenario: DNS Resolves Correctly but Application Fails to Connect
- Scenario: Duplex Mismatch Causing Slow Transfers and Late Collisions
- Scenario: MTU Black Hole — Large Packets Silently Dropped
- Scenario: VLAN Trunk Mismatch — Server Cannot Reach Its Gateway