Please enable JavaScript.
Coggle requires JavaScript to display documents.
Networks, Catalina Legeren and Catalina Piñero Pacheco, qr code legeren…
Networks
Networking Hardware
-
Switch
Same functions but more ‘intelligent’ device than a hub: if it receives a message, it checks who it is addressed to, and only sends it to that specific computer.
Network Cable
Cables are better than wireless, because they can carry much more data per second, and are less open to hacking.
-
Router
Connects together two or more networks.
A common use is to join a home or business network (LAN) to the Internet (WAN).
Proxy Server
It is a computer setup useful to share a resource, usually an Internet connection.
-
Firewall
Device or piece of software that is placed between your computer and the rest of the network. Protects from hackers.
Modem
-
-
ADC
required so that the analogue signals (noises) that arrive via the telephone line can be converted back into digital data.
Advantages
-
Makes it easy to share files, data and resources (printers and internet connections).
It is also a very efficient way to store data centrally, easy access and back-up
-
-
-
Types of network
WAN (Wide Area Network)
Network that extends over a large area, often created by joining several LANs together.
-
LAN (Local Area Network)
Network confined to one building or site.
Often a private network belonging to an organisation or business.
-
Network Topologies
HIBRID
Network that combines two or more of BUS, STAR and RING basic topologies.
STAR
Network where every computer is connected to a central device that passes messages between computers.
BUS
Network where a long, central cable, (the ‘bus’) is used to connect all of the computers together.
-
Disadvantages
-
If the network breaks, many tasks become very difficult
-
Concept
-
Can be connected through cables, telephone lines, radio waves, satellites, or infrared light beams
In order to exchange data, share resources and communicate.
Internet, Intranet, and Extranet.
-
-
-
-
-
