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NETWORKS By: Candelaria Vila & Joaquina Canal - Coggle Diagram
NETWORKS
By: Candelaria Vila & Joaquina Canal
Advantages
Share Files
Music and video files.
Stored on one device and share in many computers.
Many computers can share one printer over a network
Share Internet Connection and Devices
To avoid needing to dowload and store the whole software field, it can be possible to stream software using web applications.
Sharing information
Music and video files, can be stored on one device and shared across many computers, so every computer does not need to fill the hard drive with files.
Roaming Profile
Can use computers anywhere in the world to access their information
Communication
Communicate using email, text messages, voice calls and video calls.
Roaming
If information is stored on a network, it means users are not fixed to one place.
Sharing resource
Twenty computers in a room could share one printer over a network.
Disadvantages
Reliance on Networked Resources
Users relaying on a network might be stuck without access to it.
Expensive hardwork
Is require to set up a network, routers, network cards and other network hardware .
Specialist staff often required
Dependence
Users relying on a network might be stuck without access to it
Hacking
Criminal hackers attempt to break into networks in order to steal personal information and banking details.
Hardware
Routers, network cards and other network hardware is required to set up a network.
Viruses
They can quickly spread and damage files on many computers via a network.
Types of Network
VPN
Usually hosted securely on another network
Often used when working on secure information
LAN
Network of computers in the same building
Not necessarily connected to the internet.
WPAN
Allows an individual to connect devices to a desktop machine
Form a Bluetooth connection with devices in a car.
WAN
Created when LANs are connected.
Can connect up organisations based in different geographical places.
PAN
Not necessarily on the internet.
Personal area networks
Hardware devices
Switches
The role of the switch is similar to the hub and the bridge, but the function is more powerful.
It stores the MAC addresses of devices on the network and filters packets to see which devices require them.
Waps
Usually built into the broadband router.
Need to connect to the network wiresley.
Bridges
The bridge is used to connect two separate LAN networks.
The computer can act as a bridge to the operating system.
The bridge will find the receiving device before sending a message.
Router
It can also connect different networks together.
Homes and offices use a router to connect to the internet.
Hubs
This consumes a lot of bandwidth, which causes unnecessary data to be sent.
Not all computers might need to recieve the data.
Modem
A modem allows the computer to connect to the Internet through a telephone line.
Convert the computer’s digital signal into an analog signal, and then send it over the telephone line.
Network Topology
Star Network
Advantages
High performing as no data collisions can occur
They are very dependable
If one cable or device fails, then all the others will continue to work
Disadvantages
Expensive to install
uses a lot of cables, and network cables are expensive
Extra hardware is required
Hubs or switches, add to the cost.
If a hub or switch faild, all the devices connectes will have no network connection
Tips
Own cable that is connected to a switch or hub
Bus Network
Advantages
Cheap installation
Tips
Disadvantages
Every workstation on the network "sees" all data on the network, which may pose a security risk.
If the main cable fails or is damaged, the entire network will fail.
As more workstations are connected, network performance will slow down due to data conflicts.
Ring Network
Disadvantages
If the main cable fails or any device fails, the entire network will fail
Advantages
Can transfer data quickly,as data only flows in one direction so there won't be any data collisions
Tips
Each device (such as a printer) is connected in a ring, so each device is connected to two devices.
Communication
MAC Address
The MAC address is a unique code built into a NIC. No computers have the same MAC address.
MAC- Media access control
HTTPS
HTTP transfers web pages from web servers to the client. All web page addresses start with http.
An https address is used for sites holding bank details and secure information.
IP
A unique address for each computer device on a network
IP- Internet Protocol
A set of rules for communicating over the internet. IP can also stand for intellectual property.
Server (Services)
File Server
Gives network users a place to save and load their data and files.
Print Server
Controls how printing on the network takes place.
E-Mail Server
These store email messages. Your browser makes request to mail servers to retrieve the messages.
Web Services
Web servers host websites and generally handle requests for static information such as HTML pages or images
They are used to manage the website on the server
Internet- Intranet
Intranet
Private Internet
It function is like the internet but only the user of the intranet has access.
This only exist when the company and users login id and put a password before they can join.
Internet/ Extranet
Huge collections of computers and networks that joined together.
You can potentially access and share data from other computers that are connected
Largest source of shared information in the world.
VOIP
Set of protocols that enables people to have voice conversations over the internet.