Presented by: Faisal Mohamed & Mohamed Dabour Types Of Network Presented by: Faisal Mohamed & Mohamed Dabour

INDEX Networks classified by architecture Network classified by coverage Network classified by Users

Computer Network: A network consists of two or more computers that are linked in order to share resources, exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams

Need of Computer Network: File sharing Resource sharing Communication and collaboration   Remote access Data protection

Networks classified by architecture

1.Client/server architecture Client-server architecture (client/server) is a network architecture in which each computer or process on the network is either a client or a server. Servers are powerful computers or processes dedicated to managing disk drives (file servers), printers (print servers), or network traffic (network servers ). Clients are PCs or workstations on which users run applications. Clients rely on servers for resources, such as files, devices, and even processing power.

2.Peer-to-peer architecture Often referred to simply as peer-to-peer, or abbreviated P2P, a type of network in which each workstation has equivalent capabilities and responsibilities. This differs from client/server architectures, in which some computers are dedicated to serving the others. Peer-to-peer networks are generally simpler, but they usually do not offer the same performance under heavy loads.

Network classified by coverage

1.Local Area Network: A local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link. Typically, connected devices share the resources of a single processor or server within a small geographic area . . A local area network may serve as few as two or three users or as many as thousands of users.

2.Wide Area Network: The WAN is a communications network that makes use of existing technology to connect local computer networks into a larger working network that may cover both national and international locations.

Network classified by Users

1.Intranet An intranet is a network based on TCP/IP protocols (an internet) belonging to an organization, usually a corporation, accessible only by the organization's members, employees, or others with authorization. An intranet's Web sites look and act just like any other Web sites, but the firewall surrounding an intranet fends off unauthorized access.

2.Extranet A buzzword that refers to an intranet that is partially accessible to authorized outsiders. Whereas an intranet resides behind a firewall and is accessible only to people who are members of the same company or organization, an extranet provides various levels of accessibility to outsiders. You can access an extranet only if you have a valid username and password, and your identity determines which parts of the extranet you can view.