Networking Protocols Deep Dive

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

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

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

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

DNS maps names to typed records through a distributed hierarchy.

Follow the key state changes and boundary checks involved in dns resolution is a chain of cached questions.

TCP provides applications with a reliable, ordered byte stream over an IP network.

Follow the key state changes and boundary checks involved in tcp provides an ordered byte stream.

TLS protects an application connection by negotiating cryptographic parameters, establishing shared traffic keys, and authenticating a server certificate under a trust policy.

An interactive concept flow for tls establishes keys and authenticates a peer, from its assumptions through the main operation and boundary checks.

Model one-way network links as a weighted directed graph and find when every reachable node receives a signal.

A practice prompt about the browser, network protocols, edge services, and application work behind a page load.