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Topic · 4 lessons

Internet & Networking

Follow a name, a packet and a connection across the internet.

Requests and connections

How DNS WorksFollow a domain name through a resolver, the DNS hierarchy and a cached answer.6 minLessonHTTP and HTTPS ExplainedWatch a browser send a request and receive a response, then place that exchange inside a protected channel.6 minLessonHow TLS WorksSee how a client checks server identity and establishes keys for an encrypted connection.6 minLessonFrom Your Browser to a WebsiteMeet clients, servers and networks before learning how they are secured.7 minLesson

Paths through this topic

Technology fundamentals

Learn the normal system before its security failures.

Your first cybersecurity projects

Explore roles and build small, safe pieces of work you can explain.