Join Greg Sowell for an in-depth discussion in this video Netstat, part of Networking Foundations: Protocols and CLI Tools.
- [Voiceover] Netstat is a great program for…diagnosing port and session issues.…On older machines,…I can simply run it from a standard command line,…but in newer versions of Windows,…I need administrator privileges.…I'll click on the Start button and type cmd.…Then, I can right-click on the shortcut to the application,…and choose Run as administrator.…(chime)…Just typing netstat…will begin to slowly begin to give me information…on active connections.…
To stop the program, hit Control + C.…Moving from left to right, it shows the protocol in use,…the local IP on the connection,…then a colon and a local port in use,…the remote host and remote port,…and finally, the state of the connection.…I never run netstat by itself.…I always add some additional parameters.…Running nestat with -a will also display listening ports.…
This is especially useful…if I'm troubleshooting a port conflict.…When a port is listening,…that means that the server program has the port open,…and is waiting for connections.…If a port is locked open,…
Protocols are the lifeblood of modern communication. By the end of this course, you'll know what you need to troubleshoot any network connection and keep the communication flowing.
Note: This course maps to domain 3 of the MTA Networking Fundamentals exam.
- Identify reasons why connectionless transmissions are faster.
- Determine what type of attack a gratuitous ARP announcing itself as a legitimate host indicates.
- State what IGMP snooping is useful for.
- Describe the best approach to use FTP to view and rename files on a server when your client is behind a firewall.
- Assess whether SSH is natively supported on Windows or not.
- List good uses for the arp command.