A+ 220-1002: Day 10: Displays & Networking Basics

  1. A+ Certification
  2. A+ 220-1001: Day 1: Intro, Resources & the Test
  3. A+ 220-1001: Day 2: CPUs
  4. A+ 220-1001: Day 3: RAM
  5. A+ 220-1001: Day 4: Firmware, Motherboards & Power Supplies
  6. A+ 220-1001: Day 5: Disks & Mass Storage
  7. A+ 220-1001: Day 6: Peripherals & PC Builds
  8. A+ 220-1001: Day 7: OS Operations, User Management & OS Maintenance
  9. A+ 220-1001: Day 8: Catch-up & Review
  10. A+ 220-1002: Day 9: The Command Line & OS Troubleshooting
  11. A+ 220-1002: Day 10: Displays & Networking Basics
  12. A+ 220-1002: Day 11: LANs: Ethernet & WiFi
  13. A+ 220-1002: Day 12: The Internet & Virtualization
  14. A+ 220-1002: Day 13: Portable & Mobile Computing
  15. A+ 220-1002: Day 14: Mobile Administration & Printing
  16. A+ 220-1002: Day 15: Security & Operations
  17. A+ 220-1002: Day 16: Review & Test Preparation

Displays

Slots

VESA (ISA extended)

PCI

AGP (4 versions)

PCIX (CAD/medical)

PCIe

Connectors

VGA

S-video

Component and Composite

DVI (-A, -D and -I)

DisplayPort (full and mini)

HDMI

Technologies

CRT

Plasma

Color wheel

LCD (TN, IPS)

CCFL backlights

LED backlights

OLED

Resolutions

VGA – 640×480

SVGA – 800×600

XGA

Essentials of Networking

If you’re doing my CompTIA courses, you’ll hear me mention IEEE often. You should be aware of their site and what they do on it. It’s pretty damn interesting:

https://spectrum.ieee.org/the-institute
(Thanks Herbbie!)

Client / Server Model

Hosts (Clients)

Servers (either physical machines or service daemons, like web servers, mail servers, streaming servers, etc.)

Local Area Networks (LANs)

Physical Layer (think of telegraph wire)

Wire

Fiber optic cable

Radio waves

Ethernet Cable

Unshielded Twisted Pair (UTP)

Shielded Twisted Pair (STP)

Plenum vs PVC Cable

Cat 3 – 10 Mbps, 100 meters max

Cat 5 – 100 Mbps, 100 meters max

Cat 5e – 1000 Mbps, 100 meters max

Cat 6 – 10 Gbps, but only 55 meters

Cat 6a – 10 Gbps, 100 meters max

Fiber Optic Cable

LEDs vs Lasers

Single-mode vs Multi-mode

Coaxial Cable

Ethernet Thicknet or Thinnet Co-ax (uses BNC connectors)

Cable TV/Internet Service Co-ax (uses screw-in F-type connectors

Signal Protocols (think of Morse Code)

Ethernet, Token Ring, DECnet, X.25, etc.

Today, mostly Ethernet

Ethernet passes frames. (You could call them packets, but the other kids on the playground will make fun of you.)

Ethernet cards are NICs (network interface cards, also called “host adapters”).

NICs have “permanent” hardware addresses (Physical Addresses in Windows): MAC Addresses.

Info
All local network traffic is sent to and from MAC Addresses. Think of them as the room numbers in a hotel, used for things like Room Service.

 

Mac Addresses are written in hexadecimal (base 10 notation, using 0-9 and A-F to express numbers from 0-15)

Hex numbers look like this:

0f38  # or

0x0f38  # or

0f38h

Topologies

Bus Topology

Bus_Topology

Ring Topology

Ring: Token Ring

Token_ring

Star Topology

Mesh Topology

Mesh: Full vs Partial Mesh

Hybrid Topology

Hybrid_Topology

Structured Cabling

Telecom room

Work area

Equipment racks: 19″ wide, 1.75″ U (height units)

Patch panels

Punchdown tools

Crimpers

Cable testers

Textbook Time

Token_ringChapters 17 and 18