On Monday, January 18, 2021 8:57:38 AM CET Raffaele BELARDI wrote: > > -----Original Message----- > > From: Jack <ostrof...@users.sourceforge.net> > > Sent: Saturday, January 16, 2021 22:00 > > To: gentoo-user@lists.gentoo.org > > Subject: Re: [gentoo-user] network transfer speed > > > > I may be way off base here, but if the switch is connected to a router, > > packets from one PC go to the switch and then to everything else connected > > to it, including both the other PC and the router. Is there any chance > > the > > router is passing packets back to the switch to get to the second PC? I > > can imagine that causing lots of problems. However, I would hope it is > > smart enough to know it doesn't need to do so, since both PCs show up on > > the same router port. > > A switch uses the Ethernet MAC destination address to forward a packet only > on the 'interested' ports. What you describe would be a 'hub' [1], I don't > think it's easy to find one of those on recent networks. > > Raffaele > > [1] https://en.wikipedia.org/wiki/Ethernet_hub
Some cheaper switches fail-over to hub-mode when the traffic exceeds what it can manage. -- Joost
