BANDWIDTH for DUMMIES :)
by powsey damon on Apr.28, 2010, under Uncategorized
bandwith is like a motor way there is so many lanes and the speed is the same but more cars can travel it is the same with data it doesent change the speed it adds more data .
Bandwidth is measured in bits per second they measure:
- bps – bits per second
- kbps – kilobits per second
- Mbps – megabits per second
The reason for this usage is that according to Hartley’s law, the maximum data rate of a physical communication link is proportional
by powsey damon on Mar.24, 2010, under Uncategorized
Preventive :
Is to try to prevent a problem before there is a fault like running certain tests like anti-virus tests and formatting
Remedial :
If the tests don’t work or didn’t prevent the problems you wanted it to you then move on to remedial
| preventive | Fault | remedial |
| Monitor ink levels | No ink | Replace ink cartridge |
| Regularly service of printer | Regular paper jams | Printer engineer -£££ |
| make sure you check that the drum is at a constant speed | The paper would print properly and be ink all over the page | Get a new drum if it is a problem with the drum but if it’s with the computer speed |
| Make sure that the USB is suitable and make sure it work | There would be no data or power connection | Buy a new USB -£££ |
| Monitor paper level | No paper | Replace paper |
| Check updates for driver | Printing crazy characters | Replace driver |
| Mantain regualry | No print | Check for jam |
interface speeds
by powsey damon on Mar.23, 2010, under Uncategorized
| Interface | speed | notes |
| Ethernet | 100 megabits-per-second | Ethernet is a internet connections |
| Firewire | A:400 megabits per second b: 800 mega bits per second | 1394 |
| Bluetooth (1.1/2.0) | 721 kilobits per second/3 megabits per second | |
| Parallel | 115.2 kilobits per seconds | |
| serial | Serial 28. 9 kilobits per second | |
| USB(1.1/2.0/3.0) | 12 megabits per second/480 megabits per second/5gigabites per second | |
| Wi-Fi | 54 megabits / 11 megabits /54 megabits per second / 540 megabits per seconds | Wi-Fi is a internet connection |
summary of chapter 6 laptops and portable devices
by powsey damon on Feb.10, 2010, under Uncategorized
chapter 6 is about laptops pda’s smart phones and when they were invented
the history of laptops
the first laptop was called the the grid compass made in 1979 it was used by NASA
next was the osbourne 1 it weight was 24lbs it cost $1795 / £1149.98 british pound it had a 5 inch screen
in 1983 the TRS was invented it weighed 4lbs and it was also powered by AA batteries
in 1988 the compaq slt. /286 was invented it was the first computer with vga (Video Graphics Array) this cost around $5399 or £3,450.94
in 1991 the macintosh power book 100 series was established as a form factor (the size ,weight height ) for all modern laptops
in 2006 laptops are now wireless and compact and sleek leight and a good performance
PDA’S 
The PDA is an electronic personal organizer with tools to help organize information:
- Address book
- Calculator
- Alarm clock
- Internet access
- Global positioning
smart phones 
Smartphones may include these additional options
- Built-in camera
- Document access
- Abbreviated note-taking
- Television
desktop vs laptop
by powsey damon on Feb.09, 2010, under Uncategorized
| desktop | laptop | |
| Motherboard | The only difference is a desktop motherboard has a smaller chance of overheating. | The laptop motherboard has a lot more chance of overheating |
| Power management | Desktop uses APM/ACPI | Laptops use ACPI |
| Processor | In a desktop the processor doesn’t work as good as the laptop and it takes up a lot of space | In a laptop the processor works better than the laptop and it is smaller |
| Expansion slots / ports | A desktop uses a Mini pci | A laptop uses pci pcle Isa and agp |
power management & acpi standards
by powsey damon on Feb.03, 2010, under Uncategorized
the computer is on and the cpu is running
step 1-the computer is not runnig however the cpu and ram are still recieving power
Step 2- the cpu is off but the ram is refreshed. the system is in a lower mode than step 1
Step3-the cpu is off and the ram is set to a slow refresh rate . this mode is often called save to ram in windows xp this state is known as the standby mode
Step 4-the cpu and ram are off. the content of ram have been saved to a temporary file on the hard disk. this mode is also called dsaved to disk in windows xp this state is known as the hibernate mode
Step 5-the computer is off and nothing has been saved
laptop and desktop component comparision
by powsey damon on Feb.03, 2010, under Uncategorized
the difference between desktop and laptop are the components are lighter and smaller and compact so it is portable and the desktop is a chunkyer model .
the componenets makes the desktop more impact what means the desktop will get very hot that is why it has a cooling fan on top of the cpu to keep it cooler
the components in the laptop are much smaller and lightweight so it is portable there is less room for ventalation so the heat will build up
Hello world!
by powsey damon on Feb.02, 2010, under Uncategorized
Welcome to lateforlunch.co.uk Student Blogs. This is your first post. Edit or delete it, then start blogging!
