Netstat: is a utility to display TCP/IP statistics and details about TCP/IP components and connections to a host. Netstat is useful to check what ports are open on your computer, to see which network connections are currently established, how many packets have been handled by a network interface since it was activated etc. Check the screenshot below:

netstat

Netstat ““a provide a list of all available TCP and UDP connections,

Netstat ““e display details of packets that have been sent

Netstat ““n list currently connected hosts

Netstat ““p allow to specify what type of protocol you want to check

Netstat ““r provide a list of routing tables

Netstat ““s figure it out

NSlookup: is a utility to query DNS tables, using this utility you can find what your DNS server is or any DNS server you specify for example nslookup google.com

nslookup

Tracert: is a utility to check connectivity from one computer to another it gives you the details of the hopes it goes through

tracert

Ipconfig: provides TCP/IP settings info, IP address, DNS server, DHCP server, default gateway etc, very useful when you work on networking.

ipconfig