6.Network topology.…………………………………….………….7 Bus network..…………………………………….………….8
Network Classification Connection methods
Wireless network technology uses electromagnetic waves, such as radio signal frequency, to allows two or more computers to communicate and exchange data. However ZAIN Company use the (WLAN) is a wireless local area network is to linking two or more computers without using cables and usually providing a connection through an access point to the wider Internet. Also, (WLAN) its carry the signal over all communication parts which is coverd all the local area and gives the ability to move aroud still connected to the network. And this mode allowed to trasmate voice, music, television redation and data communication. Example of wirless service that ZAIN Company that proved it, cellular for phone calls, global postioning system (GPS), cordless telephone sets wich is accept big range of phone calls. Wireless local area networks have become popular for the home user and small because of easy installation and mintance and the increasing popularity of using computers. Public businesses such as coffee shops, malls, and hotels have begun to offer wireless access to their customers, sometimes for free.
“Dial up” Wired it was the first technology created to share date by linked tow computers with each other directly through wire. And it should run from each computer to another computer or to the central device. And it’s expansive and its extremely reliable, because manufacturers have been continually improving them to prove good service and quality. Moreover wired technologies do not prove firewall, which makes it less secure. Wired technologies are the most widely used medium for telecommunication such as twisted pair and optic fiber cable.
Zain uses two types of wires; twisted pair and optical fiber. Twisted pair cable Connecting devices to the server and is divided into types; Shielded Twisted Pair (STP) is batter thane UTP, and Unshielded Twisted Pair (UTP) the most commonly used in local networks. Optical fiber cables that can be used as a medium for telecommunication and networking because it is flexible and can be bundled as cables. It is especially advantageous for long-distance communications, because light propagates through the fiber with little attenuation compared to electrical cables. It can be breakable essay and its need allot of expensive equipment.
Wireless network is a technology that uses electromagnetic waves, such as radio signal frequency, to allows two or more computers to communicate and exchange data. However ZAIN Company use the (WLAN) is a wireless local area network is to linking two or more computers without using cables and usually providing a connection through an access point to the wider Internet. Also, (WLAN) its carry the signal over all communication parts which is coverd all the local area and gives the ability to move aroud still connected to the network. And this mode allowed to trasmate voice, music, television redation and data communication.
This refers to a network where the network nodes are connected to a central node. This central node rebroadcasts all transmissions received from any peripheral node to all peripheral nodes on the network, including the original node. This way, all peripheral nodes can communicate with all others by transmitting to, and receiving from, that central node.
4. Types of network based on physical scope
4.1 Local area network
ZAIN Company uses LANs, which is designed to use inside the origination and between employees in physical locations. Local area networks (LANS) – is defined as a group of computers and devices that share a common communication wireless or line to exchange the information. Like share one resource, server or signal processor in small area. For example home network and hospital network etc. LAN is one of the most used and basic types of networks. It is common to use such network that is connected to a group of computers through cables that are spread around the companies building.
4.2 Campus Area Network
ZAIN Company also uses Campus Area Network (CAN), which is a computer network that connects a few local area networks (LANs) network used in large universities or local business offices and buildings. This type of network is considered to be larger than the local area network, but smaller than the metropolitan area network (MAN) or wide area network (WAN).
A network architecture provides a framework and technology foundation for designing, building and managing a communication network. It is considered as a blueprint of the complete computer communication network. IT helps gaining technical leadership skills a company needs to design and implement high quality networks that support business needs. Zain Company uses the peer-to-peer networks. In this network structure, peers are organized to follow a specific criteria and algorithms, which leads to an overlay with specific topologies and properties. Zain uses distributed hash table indexing, such as in the Chord system. In Unstructured peer-to-peer networks, no algorithm for organization or optimization of network connections is provided. In particular, there are three models of unstructured architecture. The entire network consists solely of equipotent peers in pure peer-to-peer systems. In hybrid peer-to-peer systems, such infrastructure nodes to exist is allowed, and often called super nodes. In the centralized peer-to-peer systems, central servers are used for indexing functions as well as to bootstrap the entire system. Although structured architecture is similar, any algorithm does not determine the connections between the peers. An example of the centralized model would be Napster, the first prominent and popular peer-to-peer file sharing system. Gnutella and Free net. Moreover, Network Operating Systems are classified according to whether they are peer-to-peer or client-server NOSs. Peer-to-peer network would allow two or more PCs to pool their resources together. An individual resource like disk drives, CD-ROM drives, and even printers are transformed into shared, collective resources that are accessible from every PC. Because peer-to-peer personal computers have their own hard disk drives that are accessible by all computers, each PC would act as both a client and a server; (information requestor) and (information provider).
6.Network topology Bus network
Bus network topology uses common backbones to connect all network devices in a network in a linear shape. One single cable will function as the shared communication medium for all the devices attached with this cable with an interface connector. The device communicates and sends the broadcast message to all the devices attached with the shared cable. However, only intended recipient actually accepts and processes the received message. The Ethernet bus topology is easy to install and don’t require much cabling. Only one main shared cable is used for network communication in the Ethernet bus topology. Two popular types of the Ethernet cables used in the Bus topology are 10Base-2 and 10BaseT are. Moreover, Bus network works only with limited devices. If more than 12-15 computers are added in a Bus Network, performance issues are likely to occur in a bus topology. Also, if the Backbone cable fails, all networks become useless and there will be no communication among all the computers. Unlike Star topology, in which if one computer is detached from a network, then there is no effect on the other computers in the same network.
In computer networking, star topology is the most commonly used type in LAN networks. Star topologies can be implemented anywhere; home, offices or a building. All computers in the star topology are connected to central devices such as hubs, switches or routers. Each of these devices function differently. Usually, computers in a network are connected with the hub, switch or router with the Unshielded Twisted Pair (UTP) or Shielded Twisted Pair Cables. Hub is responsible of managing every activity in a network. All nodes - file server, workstations and peripheral devices - in star topology are directly connected to the hub. Star network requires more devices & cables to complete a network comparing to the bus topology. Each node failure or cable in a star network won’t take down the entire network. However if the central connecting device such as the hub switches or router fails for any reason, all network can go down or collapse.
Zain Company has succeeded in moving forward to a new horizon, where broadband and other integrated services are provided. Now, Zain competes with STC the top Internet Service Providers in the region, and enhanced Saudi Arabia, one of the most progressive countries in the field of Internet services. In the recent years, Zain experienced unparalleled development in in its growth in the sum of broadband customers and the volume of data exchanged by the company‚customers. Both using wired and wireless services. The quantity of data exchanged, by the end of 2011 was increased by 80% that year end 2010. The number of ‚wired and wireless‚ broadband customers reached is increasing, and more sites are provided with Wi-Fi services. Furthermore, it’s launching a high-speed IP technology that allows customers to watch videos, TV satellite channels, sports and movies. Globally, Batelco, as the leading Internet service provider in UAE is completing a $950 million deal to buy a quarter-stake in Zain Saudi. Also, Kuwaiti group Zain agreed to sell its 25 per cent stake in Zain Saudi to Batelco and Saudi billionaire Prince Alwaleed bin Talal's Kingdom Holding. All of the above developments highlight the continuous improvement of this company on all levels.. By establishing the integrated IP technology, along with fiber optic networks, Zain customers will have the benefit of both a high-quality service at a price competitive to other Internet providers such as STC and Mobily.