network.pptx
- 1. Network
- 2. Network A Network consists of two or more separate devices (laptops, printers, servers, etc.) That are linked together so they can communicate. Each device on a network is called a node, and various nodes can be connected physically through cables or wirelessly through radio frequencies.
- 4. LAN-Local Area network A LAN covers a small area such as one site or building. ex: a school or a college.
- 5. MAN-metropolitan area network A Metropolitan area network (MAN) is similar to a local area network (LAN) but spans an entire city or campus. MANs are formed by connecting multiple LANs. Thus, mans are larger than lans but smaller than wide area networks (WAN).
- 6. WAN-wide area network A wide area network (WAN) is a telecommunications network or computer network that extends over a large geographical distance. A WAN covers a large geographical area. Most WANs are made from several LANs connected together.
- 7. PAN-personal area network PAN is a network arranged within an individual person, typically within a range of 10 meters. Personal area network is used for connecting the computer devices of personal use is known as personal area network. Thomas zimmerman was the first research scientist to bring the idea of the personal area network. Personal area network covers an area of 30 feet. Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations.
- 8. Advantages & disadvantages of Network Advantages Sharing devices such as printers saves money. Files can easily be shared between users. Security is good - users cannot see other users' files unlike on stand- alone machines. Data is easy to backup as all the data is stored on the file server. Disadvantages Purchasing the network cabling and file servers can be expensive. Managing a large network is complicated, requires training and a network manager usually needs to be employed. If the file server breaks down the files on the file server become inaccessible. Email might still work if it is on a separate server. The computers can still be used but are isolated. Viruses can spread to other computers throughout a computer network. There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, eg a firewall.