1. 1 © 2003, Cisco Systems, Inc. All rights reserved. CCNA Networking Fundamentals Halmstad University Olga Torstensson 035-167575 olga.torstensson@ide.hh.se

2. 222 © 2003, Cisco Systems, Inc. All rights reserved. Objectives

3. 333 © 2003, Cisco Systems, Inc. All rights reserved. Networking Devices

4. 444 © 2003, Cisco Systems, Inc. All rights reserved. Network Topology

5. 555 © 2003, Cisco Systems, Inc. All rights reserved. Network Protocols

6. 666 © 2003, Cisco Systems, Inc. All rights reserved. Local-area Networks (LANs)

7. 777 © 2003, Cisco Systems, Inc. All rights reserved. Wide-area Networks (WANs)

8. 888 © 2003, Cisco Systems, Inc. All rights reserved. Metropolitan-Area Network (MANs)

9. 999 © 2003, Cisco Systems, Inc. All rights reserved. Virtual Private Networks (VPNs)

10. 10 © 2003, Cisco Systems, Inc. All rights reserved. Benefits of VPNs

11. 11 © 2003, Cisco Systems, Inc. All rights reserved. Importance of Bandwidth The amount of information that can flow through a network connection in a given period of time is referred to as bandwidth.

12. 12 © 2003, Cisco Systems, Inc. All rights reserved. Bandwidth Pipe Analogy

13. 13 © 2003, Cisco Systems, Inc. All rights reserved. Bandwidth Measurements

14. 14 © 2003, Cisco Systems, Inc. All rights reserved. Bandwidth Limitations

15. 15 © 2003, Cisco Systems, Inc. All rights reserved. Bandwidth Throughput

16. 16 © 2003, Cisco Systems, Inc. All rights reserved. Digital Transfer Calculation

17. 17 © 2003, Cisco Systems, Inc. All rights reserved. Digital versus Analog

18. 18 © 2003, Cisco Systems, Inc. All rights reserved. Using Layers to Analyze Problems

19. 19 © 2003, Cisco Systems, Inc. All rights reserved. Using Layers to Describe Data Communication

20. 20 © 2003, Cisco Systems, Inc. All rights reserved. OSI Model

21. 21 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

22. 22 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers Provides connectivity and path selection between two host Provides Logical address No error correction, best effort delivery.

23. 23 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

24. 24 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

25. 25 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

26. 26 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

27. 27 © 2003, Cisco Systems, Inc. All rights reserved. OSI Layers

28. 28 © 2003, Cisco Systems, Inc. All rights reserved. Peer-to-Peer Communication

29. 29 © 2003, Cisco Systems, Inc. All rights reserved. TCP/IP Model

30. 30 © 2003, Cisco Systems, Inc. All rights reserved. Encapsulation

31. 31 © 2003, Cisco Systems, Inc. All rights reserved. Names for Data at Each Layer