well-connected

( adj.)

   Said  of  a computer installation, asserts that it has reliable email
   links  with  the  network  and/or  that it relays a large fraction of
   available  {Usenet}  newsgroups. Well-known can be almost synonymous,
   but  also  implies  that  the  site's  name  is familiar to many (due
   perhaps to an archive service or active Usenet users).

[glossary]