Public IP address determination

My mom's Win98 SE computer is connected directly (no router, hub, or switch)
to her broadband cable modem. Her ISP is suddenlink.com . Their website
claims they provide dynamic IP addresses rather than static ones, which I
believe is somewhat uncommon for cable ISP's .

While she has an internet connection, will c:\windows\ipconfig.exe report
her
public IP address ? I need to know her public IP address so I can use
Remote Administrator to connect to her computer through the internet .

I have used R.A. to connect to my home computers from work, but there
are routers at each end, and I know how to find the public IP's in that
situation .

Joe