Postel’s idea became known as the “robustness principle” and it was meant to determine how switches and nodes on the net should behave. They should, Postel felt, be good at handling lots of different types of communications - they should be “robust” — but they should also be careful not to spread too muc

as an idea that he thought should characterize the architecture of the Internet. “Be conservative in what you do, be liberal in what you accept.”13! Postel’s idea became known as the “robustness principle” and it was meant to determine how switches and nodes on the net should behave. They should, Postel