ICT stuff
- Created by: Josh98
- Created on: 11-03-15 11:00
View mindmap
- Networking
- Basic Elements of ICT networking
- data transfer media
- networking software
- standards and procedures
- comunication devices
- comunication devices
- Hubs
- a simple device which connects all computers in one network & allows file sharing
- Switches
- in a similar way to hubs they are used to join multiple computer's together but contain more intelligence that a hub
- Network interface cards
- computer must have one of these to be connected to a network.
- contains circuity along with a socket
- socket allows the connection between the computer and the cabling
- slotted into the motherboard
- prepares data for sending over the network, sends the data and controls data flow
- Routers
- devices that join wired or wireless networks together, often act as gateways to the internet from small home computers
- Hubs
- network operating system software
- UNIX
- Novell Netware
- Linux
- network management software
- ensure software is up to date
- keep track of software being run
- provides remote control facilities for staff
- checks bandwidth is used correctly
- checks the speed of the processor
- Data Transfer
- metal wires
- unshielded twisted pair
- thin wires that are twisted to cancel out interference
- thin wire means easier installation
- only suitable for small networks
- shielded twisted pair
- wires have copper braiding which protects the data signals from outside corruption
- more expensive due to the shielding
- greater transmission speed than unshielded
- unshielded twisted pair
- Fibre optic cable
- advantages
- faster speed
- lots of data through a small cable
- no metal interference
- drawbacks
- costs are a lot more expensive that metal cable
- advantages
- wireless
- wireless connection to an LAN allows the user to use the internet up to the range that the router allows
- metal wires
- Basic Elements of ICT networking
- How Wifi Works
- the router is connected to the internet by a high speed broadband connection
- router receives data from the internet
- it transmits the data as a radio signal using antenna
- the computers wireless adapter picks up the signal and turns the radio signal into data that the computer can understand
- it transmits the data as a radio signal using antenna
- router receives data from the internet
- advantages of wifi
- allows inexpensive LANS to be set up without cables
- allows freedom of working via a signal
- good for old building where cables cannot be installed
- used globally
- drawbacks of wifi
- high power consumption
- health problems using wifi
- security problems e.g. hackers
- interference
- the router is connected to the internet by a high speed broadband connection
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