Course: An Introduction to Computer Networking for Teachers

In this step, you’re going to have a go at building your own DNS server in Scratch. First, go to scratch.mit.edu and create a new project called “DNS model”. A …

As you know, we don’t use IP addresses to access websites, even though the underlying technology needs them. You don’t often hear people speak about a great website they looked …

Previously, we looked at a simplified IP packet, with fields for the source and destination addresses as well as the data it transports. In a real IP packet header there …

In the previous step, you saw many simliarities between Internet Protocol (IP) addresses and IP packets on the one hand, and MAC addresses and Ethernet frames on the other hand. …

Last week, we introduced Ethernet addresses, which are tied to physical devices: the term ‘physical address’ always refers to an Ethernet or similar data link layer address. Imagine a gigantic …

In this step, we recap what you have learned so far to help you cement your understanding. We will also show you that some of the devices are actually multifunctional, …

In this step we will look at the various networks you’ve learned about so far and how they are used together in today’s world. We will also briefly cover Bluetooth. …

To transport data across a large network, such as a WAN, the data may travel across lots of different connections. These connections are called links because they ‘link’ the devices …

In this step, we will look at the role of a hub or a switch in a star network. You will also learn more about how addresses and other fields …