IPCONFIG Explained - Flush DNS Cache

What is IPconfig?  How do you flush your DNS cache? What is DNS spoofing? IPconfig is a command line tool that displays the TCP/IP network configuration of the network adapters on a windows computer.  It displays things like your IP address, the subnet mask, and the default gateway.  It also discusses flushing the DNS cache and switches, such as: /flushdns /displaydns /all.  It also discusses what is a dual stack.
#ipconfig

0:00 IPconfig
1:29 Dual Stack
3:32 IPconfig/all
5:01 Flushing DNS
6:59 DNS Spoofing
7:34 /displaydns