Whilst you can use more dedicated tools for debugging http connections than telnet, there is still an argument for protocols simple enough that you can use teln

Whilst you can use more dedicated tools for debugging http connections than telnet, there is still an argument for protocols simple enough that you can use telnet. Take Arduino for example, writing a naive but working http client is childs play; writing a SPDY client in Arduino is well beyond many people's capabilities. Yes libraries will appear eventually, but we've not even got a decent open http library yet.