Hi. This got me confused a bit as I was doing the activity at about the same time as the lecture (which I later found out is the lab). When I got to “Connect” , instead of the command with all the node names and options, Atlas provided this:
mongo “mongodb+srv://cluster0-tmfjv.mongodb.net/test” --username theusername .
It worked and showed connecting to the three nodes, but then as the vid continued, the lecture was still using the longer command with all the node names. Eventually, I found that the connection protocol “mongodb+srv” uses DNS seedlist. Found it in “man mongo” and here: https://github.com/mongodb/specifications/blob/master/source/initial-dns-seedlist-discovery/initial-dns-seedlist-discovery.rst