Build a DNS Server in Scratch
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 …
Course: An Introduction to Computer Networking for Teachers
Finding destination addresses with DNS and ARP
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 …
IP Packets, Routers and Routing
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 …
What is the layered model?
IP packets are transported in frames. To transport IP packets across all the various links, there are two theoretical options: Change all the data link protocols so they understand IP …
Internet Protocol (IP) Addresses
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 …
Networking Hardware
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, …
Networks in Your Daily Life
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. …
The TCP/IP model and the Data Link / Network Access Layer
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 …
Hubs and Switches in Star Topologies
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 …
These articles are from the online course:
An Introduction to Computer Networking for Teachers