Networks

• A network is a collection of devices that are connected to one another.
• What is the internet?

  An accessible network which globally connects computer systems.
• What is the WWW (World Wide Web?)


  An information system where a set of documents/pages are hyperlinked together
• Who created the WWW?

  Timothy John Berners-Lee
• When was the WWW created?

  1989
• Why was the WWW created?

  To share documents and scientific research
• When was the internet created?

  1968
• Who created the internet?

  Vint Cerf and Bob Khan
• Why was the internet created?

  To allow army bases in America to communicate / Talk to people worldwide
• Why is a wireless router needed?

  To connect people to Local Area Networks, the internet and the World Wide Web
• Why is an ethernet cable needed?

  To connect devices to a Local Area Network in a physical and faster way
• What is an ISP (Internet Service Provider)?


  A company that charges you a fee to give you access to the internet at a specific speed
• What is a Server Farm / Data Centre?

  This is where lots of web servers or computers are based.
• Server farms / Data centres store:

  • web pages
  • files
  • search data
• What does SIM stand for?

  Subscriber Identity Module
• What is stored on your SIM card?

  Your phone number
• What could you do on a NOKIA phone?

  • Call people
  • Text people
  • Play Snake
• Give 3 examples of what you could do on a 2007 phone.

  -> Listen to music

  -> Take pictures

  -> See images in colour (colour screens)

  -> Play more games

  -> Video call

  -> Record videos
• Give 3 examples of what you can do on a recent mobile phone.

  -> Use touchscreen abilities

  -> Download apps

  -> Improved audio and video quality

  -> Send voicenotes

  -> Videocall without a minute-by-minute cost
• How do Mobile Networks work?

  • Mobile networks are made up of a bunch of masts
  • Each mast has a base station
  • Your phone uses radio waves to reach the nearest base station.
  • You have a SIM card in your phone that identifies you on the network.
  • The base station then connects you to the wider phone network and the internet.
• What is the name for a 2G Network?

  Global Systems for Mobile Communications
• What does GSM stand for?

  Global Systems for Mobile Communications
• What is the functionality of a 2G network?

  -> Made to cover major cities

  -> Send MMS (Multimedia messages)
• What is the data speed of a 2G network?

  0.2 MBPS
• What is the name for a 3G network?

  Wideband Code Division Multiple Access 
• What does WCDMA stand for?

  Wideband Code Division Multiple Access 
• What does HSPA+ stand for?

  High Speed Packet Access
• What is the functionality of a 3G network?

  -> Mobile Internet

  -> Video streaming

  -> Apps

  -> 90% UK coverage
• What is the data speed of a 3G network?

  2 MBPS
• What is the name for a 4G network?

  Long-Term Evolution
• What does LTE stand for?

  Long-Term Evolution
• What is the functionality of a 4G network?

  -> High-speed connectivity

  -> 100% UK coverage, including rural areas
• What is the speed of a 4G network?

  13 MBPS
• What is the name for a 5G network?

  Multiple-Input Multiple-Output
• What does MIMO stand for?

  Multiple-Input Multiple-Output
• What is the functionality of a 5G network?

  -> Everything can connect to it

  -> Revolutionary for autonomous vehicles
• What is the data speed for a 5G network?

  10 GBPS
• What is a PAN?

  Personal Area Network
• What is a LAN?

  Local Area Network
• What is a MAN?

  Metropolitian Area Network