Security settings for old non wireless modem - Home or Public

[ktee]

This is probably a very basic question.
Have friend who knows less than me, asked for help, not able to get online.
She's on copper and has Technicolour Spark supplied modem ( Wind 7).
Had a look and no power going to modem tried different power points and pushed black button on back a few times.. nothing zero lights.

I gave her and set up my old Spark non wireless one (ADSL on lid), until she can go to shop. She's is quite happy going back to this as only a year ago she stopped using her Ethernet cable when I showed her how to use wireless.
She has up to date Internet security BUT I'm still a bit concerned I may not done something right

It came up with an 3 options to set the network ???
Choices : Home Network; If all the compts on this network are at yr home
Work Network and Public.

I picked "Home" that sounded appropriate, BUT there's a wee bell ringing saying no, I vaguely remember that for security you select Public. I think it's to do with trusted network, but don't understand why
Can anyone help

Also what would be a good modem replacement, did ring Spark but by the time she finished Pushing Fibre connection (which she doesn't want) the only thing I got was a "Spark Smart Modem" for fibre that does wireless too.

[CliveM]

Home is the correct choice.

[piroska]

Also what would be a good modem replacement, did ring Spark but by the time she finished Pushing Fibre connection (which she doesn't want) the only thing I got was a "Spark Smart Modem" for fibre that does wireless too.

That modem does fibre and ADSL. IT's fine.
Although she can buy her own if she wants.

As neither of you know how to set one up though, perhaps just stick with Sparks.