It's a rather deep discussion.
Can we keep it simple? Remember I'm more than a programmer. I create embedded hardware and was on teams that did some early wifi so my view of security is from the inside out.
1. Thanks Bob...About (3) -- Sorry, but I don't
understand how to go about using WPA2 or using PLUS.
Then it's time to read the router manual on setup and the web about HTTPS use. Remember that I can't tell you how to setup your router. The router manual wins that round.
2. I do understand
that https indicates a site is secure -- but I thought that would only
prevent others out on the internet from seeing, not necessarily someone
using the same router. Can you explain?
Sure. But I will not duplicate ready content on the web about https. I must summarize. The https is secure but I can still see on the router you are at while web site. So if you go to yugo.com, I know that much. Some folk want more security than that. If they do, they need to NEVER share their internet connection so others can't see what's being looked at. And then we know the ISP and now Google logs such accesses.
Again, if you want no one to see you go there, don't go there.
3. About (1) -- I gather you're saying that just turning password-protected-sharing on does protect my files from anyone not having a user account and password on my PC -- correct?
Almost. For years those shares have been exploited. The only safe setting is off or disabled. Why would you need to share what you don't want to be seen?
4. About (2)
-- I don't need to know exactlywhy, but are you saying there's no way
to keep others sharing the router from seeing where I'm going when I
surf the net? BTW -- if I can't stop them from seeing
where I'm going, then I don't suppose there's any way to stop them from
seeing what I do once I get there -- correct?
Close. On the router or DNS entries I see where you went. If the site is http, then I get to see the web links you go to. If the site is https then I only see the location and not much else.
There is a ton of stuff about this in great detail on the web. Because I would be duplicating the web, I must keep this shorter.