netstat

When running netstat -i from the Command Terminal,
It returns with 21 different connections..

The addresses all look like this:

::1
fe80:1::1
10:dd:b1:a5:c4:ba

with Network names like

Linke#2
fe80::8e2d

How can I delve deeper into this to clarify what is going on with my network?

Is there a way to dedicate the OS X system to only accept legitimate
connections??