section 4 notes

Describe a router and its purpose?

passes information from one network to another keeping the traffic separate , does't have to go through internet , every router gets numbered, the router controls the traffic.

Describe the use of WIFI and Bluetooth in networks?

transferring data between devices without a need for physical connection , WIFI is faster then Bluetooth , Bluetooth is used by mobile devices for transferring small data

ISP = internet service provider

 Describe how to set up a small network involving access to the internet, understanding the need to set up the use of a browser, email and an ISP?

to set a network with the internet you need a ISP it will provide you with a router.

  Identify the advantages and disadvantages of using common network environments such as the internet?

good = recognisable interface, communication , transfer of files.

Bad = viruses , mal wear, hacking

Describe what is meant by the terms user id and password, stating their purpose and use?

to dived the information between peoples account into groups then aliquot access by group.

Identify a variety of methods of communication such as fax, email, and tele/video conferencing

faxes: hard copy to hard copy and legal and security risk

E - mail : send pictures , blind copy , attach files

Tele conferencing : multiple people can join and talk to you

Video conferencing : aloud you to show materials

  Define the terms Local Area Network (LAN), Wireless Local Area Network and Wide Area Network WAN

local area networks= it is a network only on one sites , A WAN is two sides are permanently linked  to create a land we need such as network , switches hubs, bridges

Describe the characteristics and purpose of common network environments, such as intranets and the internet

Intranet = web technologies being used inside your business , people are former with technologies of the websites.

Internet =  is about sharing information and advertising

 Describe other common network devices (including hubs, bridges, switches and proxy servers)

HUB = confused box

BRIDGE = is a link between two parts of a LAN

SWITCHES = merges the traffic going from a specific part to another

Discuss the problems of confidentiality and security of data, including problems surrounding common network environments?

Identify the need for encryption, authentication techniques, including the use of user identification and passwords, when using common network environments such as the internet?

Websites (all business / All life) dream weaver

things you need to no!

1 use tagesto creae an  external stylesheet  for common styles like H1 , H2 , H3 , P , LIST

2 specify the front appearence for each style , including features like : FONT , FAMILY , SIZE, COLOUR, ALIGNMENT, BOLD, AND ITALIC.

3 attach an external stylesheet to a web page

4 create links from text and images

5 create anchors and links to anchors o the same page  (anchor is when you click a word and when you click that word it automaticlly sends to to the top of the page) .

6create links to other locally web pages

7 create external links to a websites using the URL

8 xreate links to send mail to a specified email address

9 create links to open in a specified location : the SAME WINDOWS, NEW WINDOWS , WITH A WINDOW NAMED AS SPECIFIED

10 insert tables using a table header , table rows table rows table data cell spacing and cell padding

10 a cell padding : giving gaps between the boxes and padding is giving pillows  inside the boxes

10 b cell spacing is controls the space between table cells. Although there is no official default, browsers usually use a default of 2

11 set tables width in terms of pixcels of percentage values

12 using tables with visiable and invisable boarders , set the  boarder thinkness

13 use merged cells with rows and within coloums

14 insert an image

15 using tags to adjust images size and alignment

16use software to resize an iamge , adjust the colour depth and amend the file type

17 maintain the aspect of an image or to distortt it where approprite (just hold shift down )

18 print web sites in browers view, in HTML format and screem shot evidence.

19 understand the need for low resolution images for data transfer.

websites (dreamwearver) making sites

 1   Open dreamweaver  2 : New DW site  (4ns)
 3  JPEG (picture file) added to the website folder
 4   HTML
 5 Insert table (use propterties at the bottom od the screen
 6 CELL PADDING = 5 CELL SPACING =4
 7 W = width H = height
 8 BG = backround
 9 Drag picture film from DW file lst into table

HTML ONLY

HTML, which stands for HyperText Markup Language, is the predominant markup language for web pages. HTML is the basic building-blocks of webpages.

HTML is written in the form of HTML elements consisting of tags, enclosed in angle brackets (like <html>), within the web page content. HTML tags normally come in pairs like <h1> and </h1>. The first tag in a pair is the start tag, the second tag is the end tag (they are also called opening tags and closing tags). In between these tags web designers can add text, tables, images, etc.

The purpose of a web browser is to read HTML documents and compose them into visual or audible web pages. The browser does not display the HTML tags, but uses the tags to interpret the content of the page.

HTML elements form the building blocks of all websites. HTML allows images and objects to be embedded and can be used to create interactive forms. It provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes and other items. It can embed scripts in languages such as JavaScript which affect the behavior of HTML web pages.

Web browsers can also refer to Cascading Style Sheets (CSS) to define the appearance and layout of text and other material. The W3C, maintainer of both the HTML and the CSS standards, encourages the use of CSSover explicitly presentational HTML markup.[1]

Excel Formulae

Excel Formulae

Don't forget the Formulae in Pictures file I did to help you remember what
 you are highlighting at each point in a formula. e.g. 1 cell or a list of cells.

Make sure you learn 

CSS ONLY

What is CSS? = Maybe you already heard about CSS without really knowing what it is. In this lesson you will learn more about what CSS is and what it can do for you.
CSS is an acronym for Cascading Style Sheets.
  
  What is the difference between CSS and HTML? = HTML is used to structure content. CSS is used for formatting structured content.Okay, it sounds a bit technical and confusing. But please continue reading. It will all make sense to you soon.Back in the good old days when Madonna was a virgin and a guy called Tim Berners Lee invented the World Wide Web, the language HTML was only used to add structure to text. An author could mark his text by stating "this is a headline" or "this is a paragraph" using HTML tags such as <h1> and <p>.As the Web gained popularity, designers started looking for possibilities to add layout to online documents. To meet this demand, the browser producers (at that time Netscape and Microsoft) invented new HTML tags such as for example <font> which differed from the original HTML tags by defining layout - and not structure.

This also led to a situation where original structure tags such as <table> were increasingly being misused to layout pages instead of adding structure to text. Many new layout tags such as <blink> were only supported by one type of browser. "You need browser X to view this page" became a common disclaimer on web sites.

CSS was invented to remedy this situation by providing web designers with sophisticated layout opportunities supported by all browsers. At the same time, separation of the presentation style of documents from the content of documents, makes site maintenance a lot easier.

Which benefits will CSS give me?

CSS was a revolution in the world of web design. The concrete benefits of CSS include:

• control layout of many documents from one single style sheet;
• more precise control of layout;
• apply different layout to different media-types (screen, print, etc.);
• numerous advanced and sophisticated techniques.

Privacy (Facebook)

TELLlING THE WORLD (OPENNESS is GREAT!!!)

Facebook has taught us to tell the world everything we do . 

We don't think about who is reading what we write about because all we want is RESPONSE !!! ( This makes us feel wanted and loved by others - it gives us the feeling that we are worth something )

These responses / comments drive us to tell the world more. 

School net security systems contradict their own existence by selling info to companies  and dictatorships. 

Blocking and monitoring school net activity teachers students that trying to keep private  is a bad thing and you should accept that someone needs to know what you are doing.

FEEDBACK

Must be as close to the attempt as possible. You want to do better immediately 

Games are popular because the result of your actions is shown to you as you play.

Question answers for storage devices

Backing storage : 
Name two items which are storage media.
Flash memory card      Graph plotter       Magnetic disc       OCR          OMR            Touch pad

Explain why the following are used with PCs.

Pen drives- To transfer smaller files

Blu-ray- For storage of up to 50gb and can hold HD movies

Fixed hard disc drives- Used in computers to store the permanent files

Ring two items which are output devices.

Blu-ray disc

Optical mark reader

Graph plotter

Projector

Web cam

Graphics tablet

Complete the following sentences using the most suitable storage device or medium listed

below.

(a)memory stick

(b)fixed hard disk drive

(c)DVD R

A student taking his coursework home to develop would use a  memory stick

A company selling copies of games would use a DVD R

An office worker who never took her work home would store her work on a fixed hard disk drive

IGCSE Theory Section 1-Types and components of computer systems

IGCSE Theory Section 1-Types and components of computer systems

Section 1: Types and components of computer systems
Candidates should be able to:
(a) define hardware, giving examples
(b) define software, giving examples
(c) describe the difference between hardware and software
(d)  identify the main components of a general-purpose computer: central processing unit, main/internal
memory (including ROM and RAM), input devices, output devices and secondary/backing storage
(e)  identify operating systems, including those which contain a graphical user interface, a command line
interface
(f)  identify different types of computer including Personal Computer or desktop, mainframe, laptop, palmtop
and Personal Digital Assistant
(g) describe recent developments in ICT

Storage devices and media ( Use of Backing Storage at Kings College)

( Use of Backing Storage at Kings College)

• Fixed hard discs- Used in every computer in the school
• Portable hard discs- Used to store large files
• Magnetic tape- Uses serial access for reading and writing.  Used for backups of file servers for computer networks. Optical backing storage media such as CDs and DVD and is quite cheap for backing up files at King's.
• Optical backing storage media such as CDs and DVD-CDs tend to be used for large files (but smaller than 1Gb) which are too big for a floppy disc to hold such as music and general animation.  DVDs are used to hold very large files (several Gb) such as films at school.
• CD ROM/DVD ROM-Applications which require the prevention of deletion of data, accidental or otherwise for students.
• CD R/DVD- Applications which require a single burning of data, e.g. CDs Z recording of music downloads from the internet, recording of music from MP3 format, recording of data for archiving or backup purposes at King's.
• CD RW/DVD RW-Applications which require the updating of information and ability to record over old data at King's.
• DVD RAM- Same properties as DVD RW but quicker access and data can be overwritten more easily. 
• Blu-ray-Capacities of 25Gb, 50Gb and 100 Gb.  Used for storing films (movies). 25Gb equates to 2 hrs HDTV, 13hrs standard definition TV
• Solid state backing storage-Smallest form of memory, used as removable storage at school.  More robust than other forms of storage. 
• Memory sticks/Pen drive-Used at Kings to transport small files conveniently. Flash memory cards-Used in digital cameras, palmtops, mobile phones, MP3 players at Kings