Using Nmap

[EtnaBox1]

I finally got Nmap on my laptop and trying to get familiar with it. I scanned my my own IP address just to see what's going on. I had the following TCP ports opened:135, 139, 445, 2179, 3389. Is it normal to have these ports opened?

[M02@rt37]

Hello @EtnaBox1 

Is it normal ? Yes, but...

it can be risky if these ports exposed to the internet ;  typicaly they are only reachable on your local network behind a home router or firewall. So, to stay safe, keep internal PC Firewal on, disable services you don’t use like RDP or file/printer sharing...

[EtnaBox1]

Thanks, That was helpful.