Open cmd in your system Type netstat -a This will show you the connections and whether the it is listening, established or Close_wait The question was how to determine if it's still open

Can anyone please tell me how can directly jump on topic 2 questions?? And also some tips would be nice interms of exam I am planning to give exam in the first week of February and I have watched professor messer and read through some of Darril gibson book. and then directly jumping here for the questions, do you think it will be enough ??

Some free advice. Topic 1 has old questions and you should skip it because you won't see these on the exam. Topic 2 has latest questions as of Dec 2020. I'd even recommend paying (like I did) to get access to the full list of topic 2. 90% of my questions were from topic 2

The netstat command (short for network statistics) allows you to view statistics for TCP/IP protocols on a system. It also gives you the ability to view active TCP/IP network connections. Many attacks establish connections from an infected computer to a remote computer. If you suspect this, you can often identify these connections with netstat. Source: Get Certified Get Ahead - Netstat (p.86)

The port is also mentioned that's why

How would the command look like? Because personally, i thought ping would be better because you could ping that ip adress and see whether you are getting a response from it or not. You can't use netstat to check if an external ip adress is active or not, right?