Is there specific software that is used for creating a virtual environment?

Is there anything not considered packet switching?

Is there a way to deny all incoming traffic to your firewall?

Is there any kind of slowdown when using just one port if you are getting a lot of traffic?

How often is this used?

When using ipconfig on a network I've seen the IPV4 and IPV6 addresses shown at the same workstation. Sometimes it shows IPV4 (preferred). Why is that?

If you are using :: to abbreviate sets of 2 or more zeros, how can you tell how many there are? In the example he condensed 3 sets down to ::?

He mentioned proprietary protocols. Do you always have the option to choose between the standard and proprietary or do some force you to use the proprietary?

Hiw important are the different types of protocols for IPV4 and 6?

If you can set a default route, why would you use static over dynamic?