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34 terms

Engineering Science

STUDY
PLAY
Internet
world wide system of interconnected computers networks connecting hundreds of millions of "computing devices" together.
WWW
world wide web
IP address
It's to let people know where you are on computers
Access Internet
1.Hardware
2.Software
3.An IP address
Dial Up
connect to analog to digital uses Telephone Circuit Switched Packets
Broadcast Access
encompasses all high speed digital
"Broadband Duopoly"
They dominate Broadband today
1.Telephone local loops using DSL
2.Cable infrastructure with community Antenna TV (CATV)
DSL
Digital Subscriber Line
DSL Bandwidth
25-138 (upstream)
138-1100(downstream)
Cable Bandwidth
5-42(Upstream)
550-750(downstream)
Computer
programmable machine
CPU
Central Processing Unit
is the computational engine and oversees what the computer is doing
Main Memory
Fast Storage that hold data and programs (RAM or ROM)
Mass Memory
stores massive amount of data (HDD and CD)
PC
Personal Computer
general purpose machine run different applications
HDD
Hard Disks Drive (magnetic)
HDD vs Memory storage
HDD has a ton of memory while memory storage is limited
CDS
optical
DVDS
magnetic
BIOS
(Basic Input/Output system) first instruction in the start up process and is stored in ROM
Total Energy
Kinetic + Potential
LEO
Lower Earth Orbit
90 mins-3 hours
MEO
Middle Earth Orbit
5-12 hours
adv: reduces transmission delay
GEO
Geostationary Earth Orbit
24 hours
adv: few satillites
HEO
Highly Elliptical Orbit
adv:excellent for monitoring Earth
GPS
Is MEO
GPS
Global Positioning System
24 Satellites
Wireless Networks
Mobility
Convience
Generic Wireless Advantages
1. Convince
2.Mobility
3.Connectivity
Generic Wireless Disadvantages
1.Security
2. Range
3. Reliability
WiFi
Wireless Fidelity
LAN (Local Area Network)
WiFi steps
1.Radio Signal
2.WifFi Adapters
3. Hot Spots
Bluetooth
allows PAN (personal Area Network)
WiMAX
World Wide Interoperability for Microwave Access
allows MAN (metropolitan Area Network)