- A+ Certification
- A+ 220-1001: Day 1: Intro, Resources & the Test
- A+ 220-1001: Day 2: CPUs
- A+ 220-1001: Day 3: RAM
- A+ 220-1001: Day 4: Firmware, Motherboards & Power Supplies
- A+ 220-1001: Day 5: Disks & Mass Storage
- A+ 220-1001: Day 6: Peripherals & PC Builds
- A+ 220-1001: Day 7: OS Operations, User Management & OS Maintenance
- A+ 220-1001: Day 8: Catch-up & Review
- A+ 220-1002: Day 9: The Command Line & OS Troubleshooting
- A+ 220-1002: Day 10: Displays & Networking Basics
- A+ 220-1002: Day 11: LANs: Ethernet & WiFi
- A+ 220-1002: Day 12: The Internet & Virtualization
- A+ 220-1002: Day 13: Portable & Mobile Computing
- A+ 220-1002: Day 14: Mobile Administration & Printing
- A+ 220-1002: Day 15: Security & Operations
- A+ 220-1002: Day 16: Review & Test Preparation
The internet is the physical network connecting “everything” (sort of) into one network. It consists of routers, servers, wiring and fiber-optics:
The World Wide Web is the collection of websites (and other services) that run on top of the internet.
Layers 1 and 2: Underlying Connections to the Internet
Dial-up (POTS, PSTN) using a modem (uses PPP)
ISDN using 2 B channels and 1 D channel
DSL – symmetric vs asymmetric, ATM vs Ethernet (uses PPPoA or PPPoE) –> max 18,000 feet from nearest CO
T1 – this is 24 telephone lines in a bundle. (24 Bearer channels)
Cable (uses DOCSIS)
Optic (FTTN, FTTP)
WiFi (it’s wireless, but it’s not really called “wireless”)
Cellular (correctly called “wireless”)
Connecting Private Networks to Public Networks
NAT (network address translation)
The A+ doesn’t require a deep knowledge of virtualization, but you should know the following, at least:
- What a VMM is
- What a hypervisor is
- Type 1 hypervisors
- Type 2 hypervisors
We’ll be using virtual machines (VMs) in this class, on the open-source VirtualBox platform. Here’s what you need to do, assuming you’re on Windows:
- Download and install 7zip so you can handle .7z files. As with all software, download it from the source, not from a mass download site.
- Download and install Oracle VirtualBox. Select the version for “Windows Hosts”, of course.
- Go to a site you’ll learn to love, OSBoxes:
Click on “VM Images”, then select “VirtualBox Images”.
Download Ubuntu: plain, vanilla Ubuntu, not “Ubuntu MATE” or anything else. Just Ubuntu.
- Now watch this video, and do as the narrator does, EXCEPT:
–>**Put your virtual machines, each in a separate folder, in C:\Users\Public\VirtualBoxVMs **<– Notice there are no spaces!!! No spaces!!! No spaces!!!
Type 1 Hypervisors, Type 2 Hypervisors, Docker Containers, Emulators like QEMU, etc.
Chapters 21 an 22