A LAN (Local Area Network) is a system where individual PCs are connected together within a company or organization. For example, if there are ten people working together in an office, it makes sense to connect to all of them. Thus, an office can have a single printer and ten people can print on it. Similarly, other devices such as modems or scanners can be shared. The ability to share information while connected to a network is more useful.
WLAN (Wireless Local Area Network)
A wireless LAN (WLAN) is a wireless computer network that links two or more devices using wireless communication to formation a local area network (LAN) within a limited area such as a school, home,computer laboratory, campus, or office building. It gives users the ability to roam within the area and stay connected to the network. Through a gateway, a WLAN can provide connectivity to the wider Internet. Wireless LANs based on the Wi-Fi standard are the most widely used computer networks in the world.
WAN (Wide Area Network)
The name WAN (Wide Area Network) implies that you can connect to other computers across a wide area (ie, the entire world).
Client/Server Network
This term refers to the type of network where resources are held centrally on servers and used locally by clients. The server tends to be a very powerful PC (or group of PCs), while each client workstation the users have is less powerful.)
Internet
The Internet is a global network of interconnected networks. The unique thing about the Internet is the sheer amount of information you can access from it. Whatever your interests, you can search and find information on the most obscure topics. For research, the Internet is an incredibly Valuable tool. Whether you're on the other side of the world, or you're gathering information for a rival company looking for information about your family tree, you'll find there's a wealth of information available. If you publish this content on the web, it can be accessed by everyone on the web (they can find it.) As a marketing tool, it has attractive potential. It is possible for a small company to sell products and services worldwide without needing a single sales-person. The problem these days is often not finding information but dealing with the sheer amount of information available. Also, you have no idea how accurate or up-to-date much of the information you access is.
(World Wide Web (WWW) vs Internet)
The World Wide Web (WWW) is a small part of the entire Internet. In relation to all hardware and software involved in the Internet, as well as Www, it also includes FTP (File Transfer Protocol), email and newsgroups. The WWW is basically text and images that you can view using your web browser, such as Google Chrome, or Mozilla Firefox.
Intranet
An intranet is a small, closed version of the Internet, which can only be accessed by authorized members of an organization. Intranets are becoming an increasingly popular way to share information within a company or other organization. An intranet uses Internet technology to allow users to access company documents, search databases, schedule meetings, and of course send email. Once a company installs a comprehensive intranet, many users only need one piece of software on their PCs, a web browser
Extranet
An extranet is an intranet that is partly accessible to authorized outsiders. An intranet is usually only. accessible by members of the same company or organization; An extranet also allows outsiders who have been issued passwords to gain limited access to information on the company's network. Extranets are being applied as a way for business partners to share information.
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