The document provides an overview of networking basics and Cisco systems. It defines what a network is and describes different network types like LAN, WAN, and MAN. It also outlines the five components of communication, different network topologies, and the OSI model. The document then discusses commonly used network devices before focusing on Cisco systems. It provides a brief history of Cisco and describes its products which include routers, switches, security solutions and more.

1. Networking Basics
&
Cisco
Aadarsh Srivastava
Resident Engineer in Lenovo
Date: 07-09-2014

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
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
Upper Layers
Middle Layers
Lower Layers

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 Bosack who
was in charge of the computer science department's computers, and
Sandy Lerner, 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

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/s
mall_business/resource_center/articles/conne
ct_employees_and_offices/networking_basics/

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

33. By - Aadarsh Srivastava
Contact – 7827019719
Facebook – aadarsh7777777
Thank You