Lunching computer and telecommunication network strategy
This company is very experienced in lunching computer and telecommunication networks (passive networks) with copper cables, optic fiber and wireless for sharing data on inside networks, intranet and internet with different speeds. These networks set up inside and outside of building so they need suitable foundations to transfer cables.
Learn more about network
A network makes possible to share sources and information between connected devices. The purpose of running computer networks is as follows:
- More easy connection: by using network people can connect easily to each other through email, instant message, chat room, phone, video call and video conference
- Sharing hardware: in one network environment, each computer of network can access software source and use it like; printing a document with a shared printer
- Sharing files, data and information: in one network environment, each authorized user can access all data and information that were saved on other computers. Accessing data and information in shared devices is one of the important features of these networks.
- Sharing software: users who connect to a network can run the applications that are on the far computers.
Computer networks are a collection of connected and individual computers that relate to each other and share data. Individual computer means each one has a separate control and process unit and they don’t effect on the other one.
Connected computers means there’s one physical media like a cable, optic fiber, satellites and etc. that connects them. These two features are necessary conditions for a computer network but the efficient condition to make computer network is having connection and sharing data between computers.
Here according to used descriptions to make a network we need two or more connected computers. About more connected computers there are some common basic functions. So all three primary needs should be provided and then a network performs its tasks. These three primary needs are; connection, communication and service. Connection refers to software, communication refers to a way for speaking together and service refers to other members of a network.
Computer network Categorization
The follow list shows different groups of computer network
Based on connection type
Computer networks can be categorized according to software or hardware technology that use for connected devices. For example; optic fiber, Ethernet, local wireless network, HomePNA, power line connection or G.hn.
Ethernet uses physical cabling to connect devices. The devices include hubs, switches, bridges or navigators.
Wireless network technology for connection is designed without cabling. This device use radio signals or infrared signals as a transforming media.
ITU-T G.hn uses cabling in homes (coaxial cable, phone lines and power lines) to make a local fast network (up to 1 Gigabyte per second).
Based on cabling technology
Twisted couple: twisted couple is one of the best media that use for far communication. This couple is the usual phone wire that made from two tangled copper wires. The twisted couple uses for transferring sound and data. Using two tangled wires decreases electromagnetic induction and interference. Transferring data speed ranges from 2 million bits per second to 100 million bits per second.
Coaxial cable: coaxial cable is used widely in cable TVs systems, administrative building and other work sites for local networks. The cables have inside conductor that enclosed with a flexible insulation. On this flexible layer there’s a thin conductor for flexibility of cable that is twisted. All these components are embedded in another insulated layer. Insulated layer helps less interference. The speed of data transfer ranges from 200 million to more than 500 million bits per second.
Optic fiber: optic fiber cable includes one or more glass fibers that twisted in cover layer. This cable can transfer light to far distances. Optic fiber is not affected by electromagnetic radiation. Transferring speed can be more than trillions bits per second.
Based on wireless technology
Ground microwave: ground microwave uses ground receivers and senders. Its equipment is like satellite dishes. Ground microwave uses short domains gigahertz so all the connections limits to linear view. Distance between relay stations (empowering signal) is almost 30 miles. Microwaves antenna is usually on the buildings, towers, hills and summit.
Communication satellites: satellites use radio microwaves that don’t deviate from earth’s atmosphere as telecommunication media.
Satellites are in the space, normally 22000 miles for geosynchronous satellites above equatorial line. These cycling systems around earth can receive and relay sound, data and TV signals.
Cellphone and PCS systems: cellphone and PCS systems use different radio connection technologies. These systems are divided to different geographic areas. Each area has a low- power sender or relay radio antenna to empower calls from one region to the other.
Local wireless networks: local wireless networks use one high frequency radio technology (same as digital cell) and one low frequency radio technology. Local wireless networks use spread spectrum to connect various devices in a limited region. One example of standard radio wave wireless technology is IEEE.
Infrared communication: infrared communication transfers the signals between devices in short distances (less than 10 meters) face to face. Nothing should be in transfer line.
Personal networks communications can be in form of a wire that connects to computer ports like; USB and FireWire. Also by using technologies such as IrDA, Bluetooth and UWB we can change personal networks in to wireless networks. Its devices are those we work with them every day like; Laptop, mobile, Xbox and etc.
Local area network
Local area network is a computer network that covers a small geographic area like a house, an office or a group of buildings. In comparison with wide area networks (WAN), local networks has faster speed (transfer range), smaller geographic area and free from telecommunication renting lines.
Special network which includes gained networks from inside governmental, academic, public and private connections in all around the world. Also is a place for world web wide (WWW). Internet in Latin is used for this place and it is written with a capital letter to distinguish from public meaning of connected network.
The members of internet network or provider companies use IP addresses. Special registry institutions supply these addresses to control them. As well as internet provider and huge companies that share related information in their own addresses according to border gateway protocol (BGP).
Active and passive in network
Active means equipment in network that needs power to work and they are active in producing, leading and empowering data signals.
For example; switches and routers
Passive means equipment that don’t need power for working and aren’t active in producing, leading and empowering data signals.
For example; cable, hub and types of connectors
The advantages of using wide area network
Using world wide area is suggested to institutes that have offices in different cities and they want to connect with low cost and high security.
In this kind of networks concentrated data is saved and it doesn’t need to buy email or supporting servers.
Since wide area network has a special design all the active software are always updated.
For fast communication with other parts different ways such as Skype, Facebook and Whats App can be used.
Sharing available data in hard disk and software files is so easy.
According to its bandwidth the speed of transferring data is much faster in comparison with other computer networks.