
- •Computer Basics
- •Applications: Word Processing
- •Word Processing
- •Steps to produce a document
- •Features/Terms:
- •Do it! Simple Text
- •Directions:
- •Move the cursor:
- •Features/Terms:
- •Features/Terms:
- •Applications: Desktop Publishing
- •Features/Terms:
- •Instant Messaging
- •Applications: Security & Utility
- •Security Programs
- •Types of security programs:
- •Utility Programs
- •Examples:
- •Integrated Software
- •Computer Types & Applications: Summary
- •Input: Intro
- •Types of Input
- •Keyboard
- •Common differences:
- •Input: Keyboard
- •Explanation:
- •Input: Pointing Devices
- •Input: Terminals
- •Input: Multimedia
- •Voice Input
- •Input: Data Automation
- •Input: Data Accuracy
- •Input: Summary
- •Input: Quiz
- •Processing: cpu
- •Explanation:
- •Processing: Motherboard
- •Processing: Summary
- •Output: Printer Types
- •Impact Printers
- •Types of Impact Printers
- •Types of Non-Impact Printers
- •Thus, Things to Consider When Choosing a Printer:
- •Output: Summary
- •Storage: Accessing Data
- •Total time to transfer a kilobyte:
- •Don't lose it!
- •Storage: Caring for Data
- •What are the risks?
- •First: a Back Up Plan
- •Storage: Summary
- •Computer to Computer: Transmission Media
- •Broadcast
- •Computer to Computer: Modems Signals
- •Transmission Rate
- •Physical Types
- •Digital Modems
- •Types of Digital Modems
- •How Device Speeds Compare
- •Protocols
- •Computer to Computer: Summary
- •System Software: Types
- •More Terms
- •Common Operating Systems for Desktop Computers
- •Life Cycle
- •Which is most popular?
- •Wikipedia:
- •Hitslink.Com:
- •System Software: Utilities
- •Security Software
- •Malware: What you need protection from
- •Programs that add protection:
- •Programming: Summary
- •What You See: On the Front
- •Explanation:
- •What You See: Summary
Computer to Computer: Transmission Media
With such complex communications channels, we need to be aware of the capabilities and limitations of the various media in use.
Transmission media just means the physical materials that are used to transmit data between computers.
Cable
For communications between computers that are linked by cable, there are three choices.
Twisted wire |
(phone line)
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Coaxial cable |
(round insulated wire)
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Fiber optic line |
(glass fibers)
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Broadcast
For longer distances or when cables are not practical, other transmission media come into play. We're getting really high tech here!
It may seem odd to call microwaves, radio waves, or light a "physical" medium. All are electromagnetic in nature. Sometimes they are treated by scientists like streams of teeny, tiny particles and other times like waves on the beach. In their "particle" life, they do behave like a bunch of physical particles. So it's not quite as odd as it first appears. (But all those electromagnetic things are plenty odd!)
Wireless |
(infrared, light, radio) Wi-Fi uses radio waves.
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Wi-Fi signal logo |
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Microwave |
Uses cell towers. 3G and 4G wireless connections are now common for smartphones but also laptops and tablets.
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Satellite |
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