TSGL: ADSL2 via USB or Ethernet?

[Don Penlington]

Following a recent reformat of  my C-Drive and anxious to get internet 
connection, I tried installing my D-Link ADSL2 modem via its USB2 driver, 
but couldn't get a connection. That's probably because I hadn't yet 
installed the Mobo USB drivers.

The modem manual says NOT to connect via Ethernet, but recommends USB. When 
I rang tech support they said to try the Ethernet cable, which worked fine 
and is still good after a week.  Speeds are the same as before with USB2.

I don't even know exactly what Ethernet is--I assume it's some sort of 
space travel where I might meet up with Russ next time he mislays himself.

My questions:

1. Are there any pros or cons connecting via Ethernet rather than USB2? 
Should I leave it on Ethernet while it's happy?  The USB drivers on these 
modems are often a pain to install.

2. What is Ethernet?

Don Penlington
 From the Beach at Surfers Paradise in sunny Queensland.
Computer tutorials, local scenery,  and other things at my website:
http://users.tpg.com.au/deepend/index1.html