Watch this video on Networking Fundamentals!
The whole series is good, but don't get distracted, get back to this.
Take time to make sure all of it makes sense, sort of.
Then read this on Routing Tables
- What is an interface?
- What is IPV4 vs IPV6?
- What is a MAC address?
- How do routing tables work?
- What is a protocol? What are some common protocols?