Computer Networks

a) A router passes information from network to another keeping the traffic separate (control traffic)
    two settings internal e.g. inhouse, external e.g. outside of house

b) WIFI and Bluetooth - transferring data between devices without the need for a physical connection or       wiring
    WIFI is faster than bluetooth so bluetooth is used by mobile devices to transfer smaller files
    Differences:
    Bluetooth is only between two devices through agreement
    Bluetooth creates its own network

c) To set up a network you need to have an isp, router and a browser

d) advantages-communication, transfer of files, resources, share storage, common (all similar)
    disadvantages-virus', malware, hackers, loss of resource, loss of connection

e) id's and passwords are used to divide personal files by accounts, authorize different access
    home directory=personal area of network
    

ADC converters: mics, sensors, phonelines

    

Dreamweaver

Never drag a table with the mouse

Privacy Speech TED

-The more you use facebook, the less you know about your personal life
-Desperate for social attention
-we want kids to fight isolation on social networks

How to fix the facebook problem:

-Fix the children's environment
-teach kids how to protect their privacy
-transform libraries etc. into facilities


Worst thing:

-teaches them to slowly forget about their privacy

Storage With Example Questions

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

Why Backup

We backup so in case the data or file becomes corrupted or accidentally deleted, we have a backup.

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

Credit and thanks goes to Robert Sheetz

Access Steps

Step 1. Open Microsoft Access and create a database according to exam name
Step 2. Click "Eternal Data", then select "Text File"
Step 3. Change 2, 4
Step 4. Browse for file
Step 5. Right click on the correct table and select "Design View"
Step 6. Change categories according to instructions
Step 7. Continue
Step 8. Double click your table