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Bandwidth is a computer networking term, which is how much data you can send through a network or a modern connection. Bandwidth is measured in bits per second or ‘bps’. The more bandwidth, the faster and more data can be transferred. The data travelling form one computer to another is not all sent in one big chunk it is broke up in to small pieces called packets.

This is a video which will hopefully tell you more about bandwidth :http://www.youtube.com/watch?v=lFQHU8PUork

This is also a good website where you can test bandwidth: http://www.bandwidthtest.co.uk/

In chapter 7 I learnt about Printer. There are different 4 different types of printers these are daisy wheel which is the oldest, dot matrix (which are types of inpact printer), inkjet printer and laser printers. Laser printer are offen found in offices, inkjets are found in homes and so are the dot matrix and the daisy wheel. PPM stands for pages per minute, the laser printer can print 8-200 pages per minute were the inkjet printer prints 6 -8 page per minute. Resolution is measured in dpi which stand for dots per minutes.  In the chapter we also also installed a drive for the lexmark x3350 by downloading it off the internet and then we printed a test page, during this we took screen shots of the process.

In chapter 7 we also learnt about connection speeds and scanners. There are 4 different tpyes of scanner this  are all in one, handheld, flatbed and drum scanners. We also learnt how to trouble shoot printer and scanner and the problems both can face.

While studying the chapter I felt that I could of taken more information in and could of wrote more noties in my book. Towards the end of the chapter i felt that the chapter is quite easy and I should pass. Based on this,  I could of got more notes and would of known more which would of helped me pass my test. In Chapter 8 I will take more notes and pay more attension.

Lexmark x3350 is a thermal inkjet printer, that also has a added csi scanner. The lexmark x3350 prints 5  ppm when using colour and 16 ppm when using black and white. The print resolution when using  black is 2400 x 1200 dpi and when using colour is colour 4800 x 1200 dpi. The average cost for a Lexmark x3350 cartrige is £13.28 for black and £13.78 for a colour cartrige. The average life span for the Lexmark x3350 is 6 to 8 years.

Inkjet printers are the most common type of printer that are used around the world. These steps will show you how to insert a inkjet Lexmark  x3350 printer on to the computer,

First: Go on the internet and then go on to Google:

Firefox

Second: Type in on Google Lexmark and click on Lexmark UK.

Google

Third: Click on drivers and downloads and type in Lexmark x3350

Four: Click on Lexmark x3350 drive for windows vista

Fifth:Click on DOWNLOAD

Sixth: Once downloaded, click on the download and then click on Run

Seventh: It should start to download again

Eighth: Click through the install by pressing ok and agreeing with the agreement, once your have passed this stage you should click on install to install the drive

Ninth: It should start to install

Tenth: The printer drive has now been install and should be ready.

Eleven: Now you have install the printer, plug in the cables of the printer into the PC and it to the power mains

Twelve: Click on start menu, then click on the control panel

Thirteen: Next click on the printer and devices

Fourteen: Click on the picture of the Lexmark x3350 printer

Fifteen: Click on the printer status (either offline,online or paused)

Sixteen: Next click on properties and then click on the print page link, a test page should print

In todays lesson we learnt that there are 4 types of printers. These are laser printers, inkjet printer, dot matrix printer and daisy wheel. Laser printers use electrophotographic technology, inkjet printer use electrostactic spray technology and dot matrix printer use impact technology. The number of pages a printer prints in a minute is called ppm (pages per minute)

A tranditional inkjet printer which is commonly found in homes can print 2-6 ppm. It prints 2 ppm when it is using it full colours and 6 ppm when it is using black ink only. A modern laser printer which is more commonly found in a office can print 8-200 ppm using any colour. There are 4 colours that a printer can print these are cyan (blue), black, yellow and magenta(red).

Inkjet printers and laser printer can both print words and images but a dot matrix can only print words and a daisy wheel can only print words in the same size and font. The resolution  on a image is mesured in dpi (dots per inch).

Chapter 6 is a chapter on Laptops and portable devices. The contents of chapter 6 is to know the laptops functions and components and compare these to desktops, but this chapter also tells you maintainance techniques of laptops and also tells you about trouble shooting.

The introduction to chapter 6 is about the evolution of laptops. The first ever laptop was created in 1979,  it was called  the GRID compass 1101 andwas created by NASA, it weighed 5kg and cost £10,000.

Netbooks, laptops and tablets are all types of portable pc. Netbooks, laptops and tablets are popular because they have the same technology as desktops but are lighter, portable,  have a intergrated keyboard and a mouse which is called a touch pad, and laptops have a battery. PDAs and smartphone are all types of hand held devices  that can do the same features that a pc can do. PDAs have been around since the 70s. PDAs and Smartphones can surf the net, go on games, recive messages and E-mails, have a built in camera and you can watch T.V on it.

Some common uses of laptops are working on the move, reciving E-mails on the move, using the internet in public places, playing games on the move and watching movies on the move. The most common uses of PDAs or Smartphones are surfing the net, playing games,GPS and reading e-books.

On the top view of the laptop is the bluetooth LED, batery status LED and the Stanby LED.  On the rear view  is the battery bay, battery and parallel port.  On the left side would be the ports, pc slot, ventilation grill, headphone jack and microphone.  On the front view of the laptop is the speakers, latch, ventilation grill, latch and the infrared port. On the right side is the optical drive, drive bay indicator, optical drive indicator and the VGA port. On the bottom of the laptop is the HD access panel, battery latches, RAM acces panel and the docking connector.

Although laptops and desktops have the same components, you can’t replace a laptops motherboard with a desktop motherboard because of the size. The componets on a Desktop are the more or less the same size for every desktop computer. Where  laptops components are different for every laptops because the manufactor decided the shape of the components depending on the size of the laptop.

The size of a desktop motherboard is bigger than a laptop motherboard, as you can see in this image.

Laptops cpu are designed to use less power, which means that the the laptops cpu will create less heat. Because the laptop cpu will create less heat the cpu does not have a fan to keep it cool unlike a desktopwhich has a massive fan that takes up a lot of room.

There are many expansion devices that can fit on a desktop. These are a printer, scanner, camera, keyboard, mouse, extra memory, extra hard drive and speakers. Where as on a laptop you can add a printer, scanner, mouse if you are not happy with the touch pad, extra memory and a extra hard drive.To make a pc and its applications run even smoother you can install more components and change the laptops setting. You can do this through plug in and play.

After you have had a laptop for a long period of time you will need to replace some of the laptops functions like the Battery, Hard drive, Optical drive, memory and pc card. If you had a desktop you could just buy them off the internet and they will fit, but with a laptop you will have to buy the components from the manufacturer of the computer.

There are many hazzardous areas for a laptop, because they are portable and can be moved anywhere. Some of theses hazzardous areas are putting them by food and drink, leaving a in a hot enviroment, leaving a laptop in a cold enviroment and leaving a laptop on the edge on a table where it could fall. To kept your laptops safe you can work in a clear space, in a climate where it is best to fit the manufacturer standards and leave the computer when it is not in use in a sturdy place.

It doesn’t matter how careful you are your laptop it will eventually get dirty and will need to be cleaned. To clean a laptop you need to a soft lint-free cloth, tweezers, compressed air, cotton lint- free cloth and a cleaning solution.

The final part of chapter 6 is troubleshooting. Troubleshooting is a form of problem saving that is used to repair failed application. To troubleshoot you need to:

1. Gather infomation from the customer

2. Verify the obvious issues

3. Try quick solution first

4. Gather information from the computer

5. Evaluate the problem and implement the solution

6. Close with the customer

That was my summary of chapter 6

4G  is a fourth generation network that is based around the long term evolution. The new 4G has seepds up to 100 megabits per second that is 10 times!!! faster than the 3G.

The reason we need 4G is because it has faster speed that allows the user for faster internet connection, quicker downloads and the 4G can be used in most areas.

Some Pros about 4G is that it has faster speeds, it is taking over the 2G and 3G network, which could also be a Con.

4G is coming out in britian, in May and June. 4G is currently being tested in Swedan and Norway

There are many differences between laptops and desktops.One of the main differences is that the components in a laptop are smaller e.g the motherboard, the HDD, CPU and the Ram. Laptops also are  powered by a battery and are designed to be carried anywhere. Other differences include laptops having a touch pad and  not having  a cooling system for the CPU. Laptops have a intergrated keyboard, monitor speakers and webcam. A desktop computer has a Base unit and is designed to be repaired where as laptops are not. Laptop ports are located differently from a desktopand Laptops have a pc card.

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