Hub, Switch, Router? Anyone?

The Ethernet architecture is able to utilize several different networking devices to interconnect computers. So, I decided to look for more information to help me get a better understanding of how to choose the best device for a network . I discovered a great informative video on PieterExplainsTech's YouTube channel, called "Hub, Switch or Router? Network Devices Explained".

After watching the video I learned that:

a. If you need to connect Ethernet networks to outside networks to use a router

b. Connecting the uplink port of a switch to a router allows you access to other networks

c. Avoid using hubs because they waste bandwidth
d. A switch is the rebirth of a hub that uses ARP to efficiently route packets  

FYI PieterExplainsTech's YouTube channel has other networking videos available for your viewing pleasure.