Networking Speedrun

Networking Basics in 30 Seconds

Networking in 30 seconds. Go.

Lesson notes

Key points

Layers: Networks are layered: application, transport, internet, link.
IP addressing: IP addresses plus subnet masks define network and host parts.
ARP and switches: ARP maps IP to MAC; switches forward frames by MAC.
Routing: Routers forward packets using routing tables, static or dynamic.
TCP vs UDP: TCP is reliable and connection-based; UDP is fast and connectionless.
DNS and DHCP: DHCP assigns your IP; DNS turns names into IPs.

Takeaway: Layers, addresses, switching, routing, transport, services: that's it.

Quick check: Which protocol maps an IP address to a MAC address?

ARP
DNS
DHCP

ARP resolves a known IP address to the MAC address on the local network.

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