1.2 System administration

Networking

OSI layer model

Here, we are learning about the seven different layers of computer networking, one of the core issues of system administration. You should learn what the different layers are and broadly what they do.

DNS / Domain Name System

This Video familiarizes you with how DNS requests are built and how they are resolved.

Advanced topics

These are some selected CompTIA Network+ material videos to help you get into the details of systems administration. You can consume them on the side while working practically if you like.

1. Cable Management - N10-008 CompTIA Network+ : 1.3
2. Ethernet Standards - N10-008 CompTIA Network+ : 1.3
3. IPv4 Addressing - N10-008 CompTIA Network+ : 1.4
4. Network Address Translation - N10-008 CompTIA Network+ : 1.4
5. Classful Subnetting - N10-008 CompTIA Network+ : 1.4
6. Introduction to IP - N10-008 CompTIA Network+ : 1.5
7. Common Ports - N10-008 CompTIA Network+ : 1.5
8. An Overview of NTP - N10-008 CompTIA Network+ : 1.6
9. VLANs and Trunking - N10-008 CompTIA Network+ : 2.3
10. CIA Triad - N10-008 CompTIA Network+ : 4.1
11. Wired Network Troubleshooting - N10-008 CompTIA Network+ : 5.2
12. Software Tools - N10-008 CompTIA Network+ : 5.3
13. Command Line Tools - N10-008 CompTIA Network+ : 5.3
14. General Network Troubleshooting - N10-008 CompTIA Network+ : 5.5
15. Common Network Issues - Part 1 - N10-008 CompTIA Network+ : 5.5
16. Common Network Issues - Part 2 - N10-008 CompTIA Network+ : 5.5

Servers

Virtual machines

This first video explains to you what virtualization is, how virtual machines work and why we need them.

Here we expand on the concept, comparing them with containers, like the docker containers, which the United Manufacturing Hub uses for example. It shows how Virtual Machines isolate different machine virtualization, while containers isolate different process virtualizations.

If you want to dive in a bit deeper regarding the advantages and disadvantages of bare metal, virtual machines and containers, we recommend the following video:

If you have any more questions or want us to cover a certain topic in more detail, please let us know!