that shows and help to identify the different cable connectors.
http://www.air802.com/files/RF_Connector_ID_Chart.pdf
Save that PDF and it'll come in handy some day...
If you're not familiar to PDF reader, here's a link to download it. And it is free from Adobe.
https://get.adobe.com/reader/
Also, if you don't want to download their two options, just uncheck them.