Week 6 Lesson Plan Addendum


Source Network:

Destination Network:

Source Computer:

Destination Computer:

Basic Electronics


Watts - power

Volts – potential to move electrons

Amps – current – flow of electrons

Metal – easily deflected electrons because they have excess in outer orbit

Insulator – hard to move electrons because they absorb electrons

Test Equipment – voltmeter and amp meter

Draw circuit on board with switch

Power measurements

PIE – wattage ratings 250 okay 400 better

Outlet tester

Neutral – white larger pin

Hot – black smaller pin

Ground – green bottom half moon shaped pin

NOTE: voltage in US stays at 110 volts so adding components to a computer must increase the current usage and thusly the wattage of the power supply must increase.

AC – alternating current – George Westinghouse

DC – direct current – Thomas Alva Edison

Mention competition that Edison lost

Surge Suppressors

ESD – static electricity

UPS – Uninterruptible Power Supply

Battery back up systems

Power off split second – what occurs

EMI – Tempest

Testing Power Supplies

Observations made before testing

Any burnt parts or odors?

Everything connected and turned on? Loose cable connections?

Computer plugged in?

All switches turned on?

Wall outlet good?

If fan is not running, turn off computer

Connections to power supply secure?

Cards securely seated?

Using Ohmmeter instructions

Measure voltage – device cables

Red wire – 5 volts

Yellow wire – 12 volts

P8 P9 pin outs

Red +5v

Blue -12v

Yellow +12v

White -5v

P1 pin outs

Pin 1 +12v

  1. +5v

  1. +5v

7 +5v

9 +3.3

11 +5v

12 +5v

13 -5v

19 -12v

20 +3.3v

Note: ATX Power supply must be have remote switch connected to motherboard before power is applied to ATX Power Supply

Test Power Supplies in classroom

Power Management – right mouse click on desktop – properties – screensaver – power  monitor – also can be found in bios

Energy Star

Networking Devices


The hub is a central hardware component for many LANs. Hubs operate at the Physical Layer in the OSI model. Hubs contain multiple ports, and can connect to other hubs to expand the network.


A device that can be used to connect two cables and that boosts the signal before sending it along.


A device used to connect two network segments together.


A multiport bridge that allows several segments of a network to communicate with one another.


A network device used to connect networks of different types and that forwards packets from one network to another, even those separated by great distances. A router determines the best route to use to deliver the data.       


A network hybrid device that combines the capabilities of bridges and routers.


99% of the time, the gateway refers to a router and uses the same IP Address. However once in a great while, a gateway is a dedicated network computer whose job is to convert data packets from one network protocol to another. Enables dissimilar networks to communicate.

Token Ring Devices

Token ring networks use MAU devices (another name for a hub)