Packet Switching - Exact Definition

Divides messages into packets and send each packet individually. The interent is based on a pcket-switching protocal.

Circuit Switching - Exact Definition

A type of communications in which a dedicated channel (or circuit) is established for the duration of a transmission. The most ubiquitous circuit-switching network is the telephone system, which links together wire segments to create a single unbroken line for each telephone call.

Protocol - Exact Definition

Unwritten rules or guidelines that are peculiar to every culture or organization, and are supposed to be observed by all parties in the conduct of buisness, entertaining, negotiating, politics, etc.

9.1 Code

Private Sub hsbRed_Scroll (...) Handles hsbRed.Scroll
    Me.BackColor = ColorTranslator.FromO1e(RGB(hsbRed.Value, hsbGreen.Value, hsbBlue.Value.))
End Sub
---------------------------------------------------------------------------------------------------------Private Sub hsbGreen_Scroll (...) Handles hsbGreen.Scroll
    Me.BackColor = ColorTranslator.FromO1e(RGB(hsbRed.Value, hsbGreen.Value, hsbBlue.Value.))
End Sub
---------------------------------------------------------------------------------------------------------Private Sub hsbBlue_Scroll (...) Handles hsbBlue.Scroll
    Me.BackColor = ColorTranslator.FromO1e(RGB(hsbRed.Value, hsbGreen.Value, hsbBlue.Value.))
End Sub
---------------------------------------------------------------------------------------------------------Private Sub hsbBlue_scroll (ByVal sender As System. Object, ByVal e As System.Windows.For (...)
    Call ShowFormColour( )
End Sub
---------------------------------------------------------------------------------------------------------Sub ShowFormColour( )

End Class
---------------------------------------------------------------------------------------------------------Me.BackColor = ColorTranslator.FromO1e(RGB(hsbRed.Value, hsbGreen.Value, hsbBlue.Value))
---------------------------------------------------------------------------------------------------------Private Sub hsbRed_Scroll (...) Handles hsbRed.Scroll
    Call ShowFormColour( )
End Sub
---------------------------------------------------------------------------------------------------------Private Sub hsbRed_Scroll (...) Handles hsbRed.Scroll
    Call ShowFormColour( )
End Sub
---------------------------------------------------------------------------------------------------------Private Sub hsbRed_Scroll (...) Handles hsbRed.Scroll
    Call ShowFormColour( ) ---------------------------------------------------------------------------------------------------------

9.4 Code

 Public Class Form1

    Private Sub btnNewName_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNewName.Click
        Dim Name, NewName As String
        Name = txtname.Text
        NewName = UpperCaseFirstLetter(Name)
        lblNewName.Text = NewName
    End Sub
End Class
- - - - - - - - - - - - - - -
Module Module1
    Function UpperCaseFirstLetter(ByVal OldString As String) As String
        Dim FirstLetter As Char
        Dim NewString As String
        FirstLetter = Char.ToUpper(OldString.Substring(0, 1))
        Mid(OldString, 1, 1) = FirstLetter
        NewString = OldString
        Return NewString
    End Function
End Module

Wiki, Blog, Microblog, RSS

• Wiki

-Wikis are websites that allow for users to collaborativly and make and edit webpages and articles, allowing for the compilation of useful information
-These websites can be edited and saved by any person in the world and all the information is compiled as a database of information.
-An example of a wiki, and the most well known wiki is Wikipedia

• Blog

-A blog is usually supervised and maintained by one person who regularly visits their blog and frequantly posts about different aspects of life and allows people all aroudn the world to read them
-Blogs usually allow for people to place comments and to rate other peoples blogs.
-An example of a blogging website would be Blogger.com

• Microblog

-Microblogs are blogs that have much smaller contents. A microblog entry usually consists of no more than a short sentence fragment, an image, or a video
-It is mainly used to give small and quick updates to friends and followers
-An example of this would be Twitter.com

• RSS

-Real simple Syndication (RSS) is standardised form of web feeds used to publish frequent updates of work
-An example of RSS is blog entries, news headlines, audio and video

Computing Mid-Term Test

Today i had a test on Chapters 1 and 2 and i found it pretty difficult but i think i got around 20/32

Types of Operating Systems

• Real Time Operating Systems - Used to control machinery, scientific instruments and industrial systems.

• Single User, Single Task - Used to manage the computer so that one user can effectively do one thing at a time.

• Signle User, Multi Tasking - This is the most common type of operating system used on Desktops and Laptops. An example is microsoft windows which lets the user access many different more than one program at once.

• Multi User -  Allows many people to access a computer at the same time and use different programs.

Purpose of Operating Systems

An operating system is a system that allows the computer to communicate with the harddrive. Without this you would not be able to tell the computer what to do and the computer would not have any instructions to follow.

Applications

Three different types of Applications

Commen Applications - eg IPhoto, MYOB


Generic Applications - eg Word, Powerpoint, Excel, etc


Custom Applications - eg For a unique scenario, for one task/purose

CPU & Hard Drive

CPU is running at such an incredible speed that it can not talk to a Hard Drive.
This is because it is like a person in a jet plane (CPU) trying to talk to someone on a bicycle (Hard Drive).

Definition of Array:

An array is a data structure that stores as many items as you require using a single variable.

The 3 Types Of Loop.

There are 3 types of loop:

• For Loop
• While Loop
• Do-While Loop

For Loop - This is a Loop that 'Repeats a specified number of times'

While Loop - A while loop is 'A loop that repeats while some condition is satisfied', This loop tests the condition only at the begining of the loop.

Do-While Loop - This is a loop that 'repeats while some condition is satisfied', differs from a While Loop because a Do-While loop tests the condition at the end of the loop.