I considered suggesting using 127.0.0.1, but I felt that at least a meaningful portion of the audience might know that that is the local host. 203.0.113.42 is g

I considered suggesting using 127.0.0.1, but I felt that at least a meaningful portion of the audience might know that that is the local host. 203.0.113.42 is good as are the other test nets. I wasn't aware of these before though.