An IP address gets a packet to the right computer, but it’s the port number that makes the connection between two applications on separate systems. It’s critical to understand how port numbers do their job and to memorize many special port numbers.
I've got one connection that's going out … to my internet service provider. … I've got a little cable going to my plug into, … and then on the other end I've just plugged it … in the back of my computer. … The most dangerous part about SOHO routers … is that they're designed to pretty much … work out of the box. … on my computer. … So what you're looking at is what they call a status screen. … Pretty much all these little routers have this. … Notice that there's a checkmark next to the internet. … It's letting me know that it's on the internet. … This is the connection up to my WAN, okay? … And then here's my internal connection … for my particular system. … This is just one kind of web interface. … At home, I've got native gigabit ethernet … coming into my house, and that's through AT&T, … and here's a picture of what that web interface looks like. … The bottom line is, don't panic about these interfaces. … They all look different, but they really say the same thing. … You've just got to take your time …
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- How TCP and IP work together
- Special IP addresses
- Port numbers
- Working with DNS
- Basic and advanced router configuration
- Troubleshooting networks
- Connecting to a Wi-Fi network
- Repairing wireless connections