Internet |
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Intranet |
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Internet Vs. Intranet
- The Internet is a network of networks/Intranet doesn’t have to be a network of networks
- Internet is global
- Internet is public
- Intranets tend to be policed/managed
- Data on Internet may not be reliable
- Internet has more information than an Intranet
Advantages and Disadvantages
Internet
Advantages:
Disadvantages:
Intranet
Advantages:
Advantages:
- huge amounts of information can be accessed almost anywhere
- can help with disabilities to be more independent
- improved communication
Disadvantages:
- increased problems due to hacking and viruses
- paedophiles look at the children on the internet
- addiction to gambling
Intranet
Advantages:
- ideal for school because they can be used to prevent students from accessing unsafe websites
- the email system is more secure
- only information relevant to the organisation can be accessed- saves time
- less information
- cant go on websites needed
Types of Networks
LAN = Local Area Network
WLAN = Wireless Local Area Network
WAN = Wide Area Network
The difference between LAN and WLAN is LAN uses cables, but WLAN ues wireless technology
WLAN = Wireless Local Area Network
WAN = Wide Area Network
The difference between LAN and WLAN is LAN uses cables, but WLAN ues wireless technology
WLANs
Advantages:
- cheaper- less cabling
- new workstations can be added anywhere
- different devices can be connected easily
- slower transfer rates
- limited transmission distance
- physical obstacle can limit transmission
- less security
Connecting a LAN to the Internet
The internet is a WAN. The hardware and software needed to connect a LAN to the Internet includes:
- router to connect LAN to the internet
- proxy server to send request for pages and receive pages to be passed on to users
- internet browsers( chrome/internet explorer/fire fox) to search for information
ISPandweb browser
- Internet Service Provider is a company that provides services allowing you to access the internet
- you need to set up an account with an ISP to get an Internet connection installed to your location
- for a monthly fee, the service provides you with access to the Internet
- a web browser is the software you used to locate, retrieve and also display content on the WWW, including web pages, images, video ect.
Proxy Server
The role of a proxy server when a LAN is connected to the internet:
- acts as a web server
- a buffer between Internet and a LAN
- server passes requests to the internet
- passes the requested pages to individual computers
- cache/store webpages- pages often visited are loaded quicker
- used to monitor internet usage
- can block certain sites