Engineering Science
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34 terms
Terms | Definitions |
|---|---|
 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) |
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