Information Communication Technology (ICT) allows users to participate in rapidly changing world in which work and other activities are increasingly transformed by access to varied and developing technologies…
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Facilitating communications: Using a network, people can communicate efficiently and easily via e-mail, instant messaging, chat rooms, telephony, video telephone calls, and videoconferencing.
Sharing hardware: In a networked environment, each computer on a network can access and use hardware on the network. Suppose several personal computers on a network each require the use of a laser printer. If the personal computers and a laser printer are connected to a network, each user can then access the laser printer on the network, as they need it.
Sharing files, data, and information: In a network environment, any authorized user can access data and information stored on other computers on the network. The capability of providing access to data and information on shared storage devices is an important feature of many networks. Sharing software: Users connected to a network can access application programs on the network.
The ICT Network Classification:
The Network is classified into Wired Technology and Wireless Technology
Wired Technology: “It is very reliable and cheap. It is not affected by other wireless signals like portable/cellular phones, microwaves; etc.It has high life expectancy, high speed with Quality of Service.” (Erik Rodriguez, 2005 ).At the same time the length of wire runs limited, Can be affected by noise generated by machinery and magnetics, affected by moisture and other weather conditions.The wired Technology is of several type like Twisted paired wire, Coaxial Cable,Fiber Optic Cable.
Fiber Optic Cable.
Terrestrial Microwave - Terrestrial microwaves use Earth-based transmitter and receiver.. Microwave antennas are usually placed on top of buildings, towers, hills, and mountain peaks.
Communications Satellites - The satellites use microwave radio as their telecommunications medium which are not deflected by the Earth's atmosphere.
Cellular and PCS Systems - Use several radio communications technologies. The systems are divided to different geographic area.
Wireless LANs - Wireless local area network use a high-frequency radio technology similar to digital cellular and a low-frequency radio technology.
Bluetooth - A short range wireless technology. Bluetooth is an open wireless protocol for data exchange over short distances.
The Wireless Web - The wireless web refers to the use of the World Wide Web through equipments like cellular phones, pagers, PDAs, and other portable communications devices. The wireless web service offers anytime/anywhere connection.
Diagram of Network Classification:
Types of Network:
"Networks are often classified into different types as local area network (LAN), wide area network (WAN), metropolitan area network (MAN), personal area network (PAN), virtual private network (VPN), campus area network (CAN), storage area network (SAN), and others, depending on their scale, scope and purpose. Usage, trust level, and access right often differ between these types of network. For example, LANs tend to be designed for internal use by an organization's internal systems and employees in individual physical locations (such as a building), while WANs may connect physically separate parts of an
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