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Networking Fundamentals

Nishant Chavan Nishant Chavan

Overview

Use this folder to explore network basics with enough length to exercise the wiki navigation. The nested folders cover subnetting practice and lightweight monitoring.

What’s inside

  • subnets/subnetting-guide — CIDR math walkthroughs.
  • monitoring/network-monitoring — Quick checks and packet samples.

Quick reference

  • ipcalc 10.10.12.0/23 — visualize a block
  • traceroute / mtr — path checks
  • dig +trace example.com — DNS path

Baseline checklist

  1. Confirm IP/gateway/DNS on the host.
  2. Test path to dependency endpoints.
  3. Check ACLs/firewall rules on both sides.
  4. Inspect recent network changes.