WordNet (r) 3.0 (2006):

well-connected
    adj 1: connected by blood or close acquaintance with people of
           wealth or social position; "a well-connected Edinburgh
           family"

The Free On-line Dictionary of Computing (19 January 2023):

well-connected

   Said of a computer installation, asserts that it has reliable
   electronic mail 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).


The Jargon File (version 4.4.7, 29 Dec 2003):

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).