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Name :Mohamed awad ID:120100094 sub: network

Name :Mohamed awad ID:120100094 sub: network. Network. A network is a set of devices connected by communication links. Network Criteria. A network must be able to meet a certain number of criteria such as: Performance Reliability Security. Performance.

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Name :Mohamed awad ID:120100094 sub: network

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  1. Name :Mohamed awad ID:120100094sub: network

  2. Network • A network is a set of devices connected by communication links.

  3. Network Criteria • A network must be able to meet a certain number of criteria such as: • Performance • Reliability • Security.

  4. Performance • Performance can be measured in many ways, including transit time and response time. • Transit time is the amount of time required for a message to travel from one device to another. • Response time is the elapsed time between an inquiry and a response. • The performance of a network depends on the number of users

  5. Performance • Performance is often evaluated by two networking metrics: throughput and delay. • We often need more throughput and less delay. • The throughput is then calculated by dividing the file size by the time

  6. Reliability • Network reliability is measured by • The frequency of failure • The time it takes a link to recover from a failure. • The network's robustness in a catastrophe.

  7. Security • Network security issues include: • Protecting data from unauthorized access • Protecting data from damage and development • Implementing policies and procedures for recovery from breaches and data losses.

  8. Network Physical Structures • A network is two or more devices connected through links. A link is a communications pathway that transfers data from one device to another. • There are two possible types of connections: point-to-point and multipoint.

  9. Categories of Networks • Three categories of Networks • Local Area Network (LAN) limited to a few kilometers • Metropolitan Area Network (MAN) tens of miles • Wide Area Network (WAN) worldwide.

  10. Local Area Network (LAN) • A local area network (LAN) is usually privately owned and links the devices in a single • office, building, or campus . • a LAN can be as simple as two PCs and a printer in someone's home office.

  11. Metropolitan Area Networks • A metropolitan area network (MAN) is a network with a size between a LAN and a WAN. • It normally covers the area inside a town or a city. • Mainly used for interconnecting private LANs located at different areas to each other • Normally owned and operated by someone else: an independent or government service provider

  12. Wide Area Network • A wide area network (WAN) provides long-distance transmission of data, image, audio, and video information over large geographic areas that may comprise a country, a continent, or even the whole world.

  13. Internet works • Network of networks • Connection via interconnecting devices (Routers & Gateway)

  14. Summary Network : a set of devices connected by communication links. Categories of Networks: . LAN . MAN .WAN Network Criteria: . Performance . Reliability . Security 14

  15. Thanks you

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