Computer Network PDF

1 Computer Network A Computer network is a set of Interconnected computer that share resources and communicate with each Other.Besides physically connecting a Computer and Communication devices a network system sreves the important function of establishing a cohesive architectu...

1 Computer Network A Computer network is a set of Interconnected computer that share resources and communicate with each Other.Besides physically connecting a Computer and Communication devices a network system sreves the important function of establishing a cohesive architectures that allows a variety of equipment type of transformation in a near-seamless.Network can in very in size in the scope,from small in networks (LANs) to vast wide area networks (WANs) that span contents. Key components include Devices:Computer,server,routers, Switches and other hardware. Protocols:Rules govering communication, like TCP/lP,which ensures transmitted, correctly. Media:Transmission mediums,such as Ethernet or cables or wireless or signal. Toplogoies:The arrangement of network devices, such as star, bus,or mesh. Computer Networks is the Type Local area network(LAN) Personal area network(PAN) Wireless local area network(WAN) Campus area network(CAN) Metropolitan area network(MAN) Wide area network(WAN) Storage area networks(SAN) Passive optical local area network Passive optical network(PONs) Cloud network  2 Local area network(LAN) LANs is interconnect endpoints in a single domain.Examples of a LANs Include hospitals and office bulidings. Personal area network (PANs) A PAN is used by one person to connect multiple devices, such as printers and scanners. Wireless local area network (WAN) WANs is interconnect multiple LANs is larger geographical areas, such as big cities status and countries. Metropolitan area networks (MANs) A MAN connects computer resources in a large geographical, areas such as city. Campus area network(CANs) CAN is a collection of interconnected LANa is that are commonly used to by larger organization,such as government and universities. Wide area network(WANs) A wide area network is the technology that connect your offices, data centers,cloud application,and cloud storage together.A bank including it's branch offices and ATM machines. Sotarge area network(SANs) SANs us specialized and dadicated Network that connects multiple high performance data storage and devices. They provide in their built in security and block level access.A SAN is provide diasaster provide recovery because it includes different storage devices,such as as drives,and magnetic tapes and optical storage. Passive Optical network(PONs) A PON is optical fiber that delivers broadband access to end user.  3 Cloud network This is type of WANs,but it infrastructure is delivered cloud services,such as based Amazon web services,Cloud networks are a standard approach modern network. Computer Network Uses There are multiple uses for a computer network including. Communictation: Through computer network individual and organizations can collobrate using communicational using channels that may include,email,chat,vedio and conferencing. Resource sharing: These bags are a boon to users they provide a way to the printer,scanner,files which help to improve work activities and reduce cost. Remote access:Network bring technologist the power of information and assistence by making it accessible anywhere on the globe.Hence,this enables used to operate with more freedom and comfort. Collaboration: Networks to function to make it collaboration gin and tonic by offering the oppotunities to jointly on something,share thoughts,and critique and in the biggest way. E-commerce:Online sales payments are processing enpowered with the computer network that enable to business to cell products online and execute and secure payment. Education:From their use in the educational sitting they are employed to provide a basis for distance learning access, to higher education and give opportunity for collabortion among students and teachers. Entertainment:Network are applied to matters of entertainment like online gaming,online film,music steaming,and Social networking, Application of the computer network There are the multiple applications of the computer network is the including: Business application: Computer network us by business to ensure impact communication to ensurance to share resources and to allow employees to access the whole system and application from the remote locations. Educational applications: Online network are employed to educational institutions allowing students to educational possiblities,share knowledge, and collobrate with their proffessors. Healthcare applications: The healthcare benifits a lot from the computer network, which are used to store and share patients details thus allowing healthcare to provides to provider more personalized treatment. Banking and finance applications:  4 The bank and finance sector are the biggest user of computer networks to carry out transactional processing,information shearing,and the provision of secure access to financial service. Military applications: Military networks are often closed and not used for general communication Which ensurance the safety of military information. Scientific aplications: Scientific reasrch heavily depend on Computer networks because they will help establish collaboration among reasrch and facilltates the shearing of data and information. 5  6. 7 8