Computer Science › Section E · Networking and the internet › Topic E.2
The internet: architecture and addressing
The internet is not one network but tens of thousands of separately run networks that agree to carry each other's traffic. This topic shows how they are arranged, how every device gets a numeric address, and how the domain name system turns names people can remember into those numbers.
In this topic
- From research project to global network
- A hierarchy of service providers
- Getting connected: the last mile
- IP addresses
- Worked example: dotted decimal and binary
- Private addresses and NAT
- Domain names
- The domain name system
- Worked example: looking up a name
- Applications: email and streaming
- Common mistakes to avoid
- Key takeaways
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