There were many connections to and from my machine using different protocols even when I am not using any Internet-based programs.
Here are some examples:
ICMP (my IP connects to their IPs but their IPs do not connect to my IP) - all "destination unreachable".
Whois shows I am connecting to (for example):
Comcast Cable Communications
Telefonica de Espana
UCOM Corp (Japan)
TCP (my IP contacts their IPs and their IPs contact my IP).
Whois shows the connections are between (for example).
NC Numericable S.A. (France)
Charter Communications (USA)
UDP (their IPs connect to my IP but my IP does not connect to their IPs).
Whois shows their connections are from (for example):
Do you know what these IPs might represent? I am not manually (e.g. via HTTP) connecting to any of these networks.