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Networking Basics & Cisco

Networking Basics & Cisco. Shoaib Iqbal IT Engineer. Date: 10-02-2014. Networking Basics. Network. Connectivity of two or more than two devices so that they can communicate with each other. Network = Connectivity + Communication.

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Networking Basics & Cisco

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  1. Networking Basics &Cisco Shoaib Iqbal IT Engineer Date: 10-02-2014

  2. Networking Basics

  3. Network Connectivity of two or more than two devices so that they can communicate with each other. Network = Connectivity + Communication Network = Hardware + Software

  4. Network Types • Local Area Network (LAN) A high speed network that covers a relatively small geographic area, contained within a single building or campus. • Wide Area Network (WAN) A network that spans large geographical locations, usually to interconnect multiple LANs. • Metropolitan Area Network (MAN) A network that spans several LANs across a city-wide geographic area.

  5. Five Components of Communication • Sender • Receiver • Medium • Protocol • Message

  6. Protocol • Rules that govern the method by which devices share data and services.

  7. Types of Communication

  8. Topology

  9. Mesh Topology

  10. Star Topology

  11. Bus Topology

  12. Ring Topology

  13. Hybrid Topology

  14. Internet • internet is two or more networks that can communicate with each other. • Internet is collaboration of more than hundreds of thousands of interconnected networks.

  15. OSI Model • Established in 1947, the International Standards Organization (ISO) is a multinational body dedicated to worldwide agreement on international standards. • In 1978, Open System Interconnection (OSI) model was introduced. ISO is the organisation. OSI is the model.

  16. OSI Model 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical

  17. OSI Model-Division of Layers 7. Application UpperLayers 6. Presentation 5. Session Middle Layers 4. Transport 3. Network Lower Layers 2. Data Link 1. Physical

  18. The Function of a Layer • Each layer deals with one aspect of networking • Layer 1 deals with the communication media • Each layer communicates with the adjacent layers • In both directions • Ex: Network layer communicates with: • Transport layer • Data Link layer • Each layer formats the data packet • Ex: Adds or deletes addresses

  19. OSI Model

  20. OSI in Action • A message begins at the top application layer and moves down the OSI layers to the bottom physical layer. • As the message descends, each successive OSI model layer adds a header to it. • A header is layer-specific information that basically explains what functions the layer carried out. • Conversely, at the receiving end, headers are striped from the message as it travels up the corresponding layers.

  21. OSI Layers Description

  22. Commonly Used Network Devices • Hubs • Switches • Routers • IP Phones • Network Security Products

  23. Network Devices Manufacturers • Cisco Systems • HP • Huawei • ZTE • Juniper Networks • D-Link • Telco Systems • Alcatel-Lucent • Arista Networks • Mellanox

  24. Cisco Systems

  25. Company Overview • Cisco is an American multinational corporation headquartered in San Jose, California, that designs, manufactures, and sells networking equipment. • Cisco Systems was founded in December 1984 by two members of Stanford University computer support staff: Leonard Bosackwho was in charge of the computer science department's computers, and SandyLerner, who managed the Graduate School of Business' computers. • The name "Cisco" was derived from the city name, San Francisco • The logo is intended to depict the two towers of the Golden Gate Bridge.

  26. Cisco Systems Logo Concept Cisco’s logo is depicting two towers of Golden Gate Bridge

  27. Golden Gate Bridge

  28. Company Overview • Cisco Systems, Inc. is the worldwide leader in networking for the Internet. • Today, networks are an essential part of business, education, government and home communications. • Cisco Internet Protocol-based (IP) networking solutions are the foundation of these networks.

  29. Company Overview cont’d • In 1984, Cisco’s first product which consisted of exact replicas of Stanford's "Blue Box" router and a stolen copy of the University's multiple potocol router software. • Between 1992 and 1994, Cisco acquired several companies in Ethernet switching, such as Kalpana, Grand Junction, and most notably, Mario Mazzola's Crescendo Communications which together formed the Catalyst business unit.

  30. Cisco’s Products List • Routers and switches • Security and surveillance • Voice and conferencing • Wireless • Network storage systems

  31. References • https://en.wikipedia.org/wiki/Cisco • http://www.cisco.com/cisco/web/solutions/small_business/resource_center/articles/connect_employees_and_offices/networking_basics/

  32. UK Office About ODSI ODSI11 St John's Road Stourbridge West Midlands DY8 1EJ Phone: 0203 005 9500 Email: sales@odsi.co.uk Web: www.odsi.co.uk Cisco Products Dealer

  33. Thank You

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