Router's questions

I am a beginner in Linux.

I tried to scan the open port of my computer but I found that only three ports are opened which is port 80, 53 and 65535.

Then, I tried to scan my android mobile phone. It shown that all ports are closed.

I used the following command:

nmap -sT -p- (myip)

Is it normal? Or am I doing something wrong?

I use netstat to check my port status.

I was wondering what's the difference between port status LISTENING, TIME_WAIT, CLOSE_WAIT, FIN_WAIT1 and ESTABLISHED?

How to check the opened/closed ports on my computer?

I used netstat -a on command line.

• Does the port status "LISTENING" indicate that the port is open?
• Is any port, that is not shown in the output, closed?