Please enable JavaScript.
Coggle requires JavaScript to display documents.
NETWORK Ines Adrogue & Josefina Madero - Coggle Diagram
NETWORK Ines Adrogue & Josefina Madero
Devices
Modems
Modulates and demodulates signals
Allows the compute to connect to networks
Hubs
Connects many computers to a LAN (Local Area Network)
Receives data and sends it to all the computers connected to the network
Switches
Connects many computers to a LAN
Distributes the data to the appropriate computer(s) only
Bridge
Connects one LAN to another LAN
Often used to connect different part of one LAN to work together as one
Router
Allows a LAN to join a WAN (Wide Area Network)
Firewalls
Placed between your computer and the rest of the network, to protect it from hackers.
Cables/Wires
Connect together different devices to make up a network
Proxy Server
A computer setup to share a resource, usually an Internet connection.
Types of Network
WLAN
Wireless Local Area Network
Uses radio signals (WiFi) to connect computers instead of cables.
LAN
Local Area Network
Confined to one building or site, so they use cables or low-power radio (wireless) for the connections. They are usually private networks.
WAN
Wide Area Network
Network that extends over a large area. Joins several LANs together. As there are long distances between computers, exotic connections technologies are required, such as: optical fibre cables, satellite radio links, microwave radio links, etc.
BLUETOOTH
Personal Area Network
Wireless networking technology designed for very short-range connection and low-power radio signals.
Mainly used to get rid of the need of cables within the computer and other elements (such as a speaker, the keyboard, mouse or printers. It is also implied when transferring data from one computer to another.
Advantages
Communication
It allows us to communicate with other people on the network (e-mails, messaging, videos).
Sharing resources
It is easy to share resources like printers or scanners.
Sharing software
This avoids needing to download and storing the whole software file.
You can stream software using web applications.
What is a network about?
A network are two or more electronic devices connected together so that they can exchange data.text.
Disadvantages
Viruses can spread really fast and easy.
You are open to scams like phishing and web cam invasions.
If part of the network fails, this can cause the whole network to fail.
Topologies
Bus
A long central cable used to connect all the computers together, each computer has a small cable that connects to it.
Star
Every computer is connected to a central device, that passes messages between computers. IN the center you may use a Hub, or a switch.
Ring
Each computer is connected to a loop of cables, the "ring". All the computers are joines together
Hybrid
A hybrid network connects two or more of the other topologies.
INTRANET
Computer network based on internet technology but designed to exchange information within a single organisation or company.
EXTRANET
An extranet is the type of connection where other people from the outside can connect to the internal intranet.
INTERNET
Worldwide collection of networks that allows users exchange data: emails, online chats, file transfers, browse world wide