Signals, addresses, names, routes and encryption -- worked throughout on one real network failure.
You will be able to say what a network actually is, and name the four jobs You will be able to explain how a bit becomes a voltage on copper, and why a...
You will be able to say exactly what an IP address labels, and why it is not You will be able to convert any IPv4 address to binary by hand, and back...
You will be able to explain why the internet needs a naming system at all, You will be able to draw the shape of the whole name space, and read...
You will be able to explain why data is chopped into small pieces at all, You will be able to draw a real packet, layer by layer, with byte counts,...
You will be able to explain why there is no "show me the route" command in You will be able to describe the time-to-live field exactly: how many bits...
You will be able to say exactly what the internet's basic delivery service You will be able to explain TCP and UDP as two answers to the same problem,...
You will be able to state the difference between "the site is down" and "I You will be able to give a one-line test that separates those two claims,...
You will be able to tell the story of long-distance messaging from signal You will be able to explain packet switching, and say honestly who invented...
You will be able to explain what a radio wave is and why an antenna has the You will be able to explain how information is put onto a wave, from simple...
You will be able to write a complete HTTP request by hand, byte by byte, You will be able to name the three separate problems that TLS solves, and...
You will be able to say why networks are built in layers at all, what each You will be able to name all seven OSI layers, define each one, and say what...
You will be able to say exactly what `localhost`, `127.0.0.1` and `0.0.0.0` You will be able to explain the three port ranges, why ports below 1024 need...