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Networking Relationships

Networking Relationships. What is a computer network?. What is a Computer Network?. a network is: group of two or more nodes connected together by transmission media for the purpose of sharing resources. Network Elements. Node

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Networking Relationships

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  1. Networking Relationships What is a computer network?

  2. What is a Computer Network? • a network is: • group of two or more nodes • connected together by transmissionmedia • for the purpose of sharing resources

  3. Network Elements • Node • a node is any hardware device that is directly connected to a network • Examples include: • Assorted types of computer systems • Printers and plotters • Scanners • Communication hardware (modems, etc.) • Hard Disk Drives

  4. Network Elements • Transmission Media • the transmission media consists of the physical connections, that facilitate the transmission of signals, between nodes on a network • Telephone lines • Twisted Pair cable • Coaxial Cable • Fiber-optic Cable • Microwave Transmission • Satellite Transmission

  5. Network Elements • Resource • a resource is a hardware, software, or data source • Examples include: • Storage space on Secondary Storage • Ability to send a email from an iPhone • Processing power of high performance CPU • Outputting to high quality printer • Application executed from HD of remote system • Transfer of data files from node to node • Web Pages requested and received

  6. Types of Nodes • A typical network includes several nodes; some nodes act as server, some as client, and some as both server and client • Server • a server is a node that makes its resources available to and for use by other network nodes; therefore, a server shares its resources across the network • Client • a client is a node that requests and uses resources on a network which are made available and shared by a server on the network

  7. How are Resources Shared? • Resources are shared across networks through network services • Service • a service is a communication scheme or standard supplying some public demand for shared resources on a network; scheme consists of user interaction characteristics and the protocol for transmitting signal.

  8. Network Services • Lets look at a specific network, the Internet • Internet • the Internet is a global public network facilitating all sorts of services; the Internet is the largest world-wide network • Like smaller networks, resources are shared over the Internet using services

  9. Network Services • Some of the services facilitated by the Internet are: • E-mail • the email service is a network service that facilitates exchange of messages • World Wide Web • the world wide web service (WWW) is a network service facilitating the transfer and display of hypertext document files • File Transfer Protocol • the file transfer protocol service (FTP) is a network service that allows for relatively fast transfer of whole files

  10. Network Software • Software on a server facilitates the sharing of resources through services • Server Software • Examples include: • Mail Server Software • WWW Server Software

  11. Network Software • Software on a client facilitates the requesting, receiving, and using of resources shared by a server • Client Software • Examples include: • Mail Client • WWW Client • FTP Client • News Client

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