Networking

CDNs and Anycast Routing

How content delivery networks place edge servers near users and how anycast uses BGP to route to the nearest replica.

6 min readRead

The Client-Server Model

How clients and servers communicate through requests and responses, and why the distinction matters for reliability, scaling, and security.

5 min readRead

HTTP/2 Multiplexing and Connection Management

How HTTP/2 fixes head-of-line blocking with binary framing and multiplexing, and why connection reuse matters for latency.

7 min readRead

IP Addresses, Subnets, and Routing

How IP addresses identify devices, how subnets divide networks into smaller segments, and how routers use routing tables to forward packets.

9 min readRead

Ports, Sockets, and Connections

How port numbers distinguish services, how sockets are created and used, and how TCP connections are established and torn down.

6 min readRead

request flow · 5 stagesNetwork Layers in a RequestVisualize the four network layers (application, transport, network, link, physical) and how each adds a header as a request travels to a server.request flow · 5 stagesA Browser Request Reaches a ServerFollow a request from the browser through name resolution, transport, TLS, and HTTP to the application — the first mile of every system design.request flow · 6 stagesThe Web Request LifecycleVisual map of how a browser request travels from URL to rendered page through DNS, TCP, TLS, HTTP, and rendering stages.request flow · 8 stagesAn API Request's JourneyFollow an HTTPS request from browser to service and watch its response return through the same system.

What Is a Network?

A network is a system that connects computers so they can exchange data. Learn about IP addresses, ports, packets, and the client-server model.

7 min readRead

networkingSep 25, 2026

What Happens When You Call an API?

Follow an HTTPS API request from a browser through name resolution, transport, TLS, HTTP, server code, and back.

8 min readRead

Request Flows

Videos

Advanced Networking: HTTP/2, CDNs, and TLS

How HTTP/2 multiplexing fixes head-of-line blocking, how CDNs and anycast route users to the nearest edge, and how TLS secures connections.

Networking From the Ground Up

A beginner-friendly walkthrough of what networks are, how packets travel through layers, and the difference between TCP and UDP.

Networking Protocols: DNS, TCP, and TLS

Dive into how DNS resolves hostnames, how TCP establishes reliable connections, and how TLS encrypts data in transit.

networkingSep 25, 2026

The Full Lifecycle of an HTTPS API Request

A planned visual lesson tracing one API call through DNS, transport, TLS, HTTP, edge routing, server code, and the response.