Lecture

Networking II

Week 6 Lesson Plan Addendum



IP ADDRESSING



Source Network: 192.16.4.0

Destination Network: 204.10.96.0


Source Computer: 192.16.4.2

Destination Computer: 204.10.96.13





























Basic Electronics


Terminology


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

Hub


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.





Repeater

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


Bridges

A device used to connect two network segments together.





Switches

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


Routers

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.       



Brouters

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


Gateway

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)