The internet has taken over the world, but with it have come malicious actors. People want to spy on you, scam you, steal from you, or harm you through the internet. Through network security, we can shield potential victims from at least some of these harms.

Streaming multimedia is a relatively new concept in internet technology, but now has become central to the daily media consumption of people around the world.

Conditional statements are very powerful and are in used in almost every language. How does Prolog implement the same idea?

Through all the layers of the internet, the most essential is the link layer: converting bits to and from signals, detecting errors, flow control, and addressing.

When a host needs to find the best destination/prefix to another host, what routing algorithm does it use? We can use either intra or inter domain.

Everyone nowadays gets the Internet through the router in their home. But what is a router?

Besides the primary Internet protocols, there are some others to learn about, like DHCP, NAT, IPv6, etc.

How does an ISP assign IP addresses to its customers?

HTTP is probably the most visible Internet protocol to end users. It appears (as well as its cousin, HTTPS) at the beginning of every URL we use to access the internet. But how does it work?

TCP is the well-known protocol for reliable transfer of data. But how does it actually work?

Email is the most popular way in the world to send large messages. This is a complicated process which requires its own protocol: SMTP.

Before we had Google Drive, users needed a way to access files from other people quickly and easily. The method for that was FTP.

How do we get the best performance in sending information over the internet? What is packet switching and how can it help?