1. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 1 Chapter 16 Connecting LANs, Backbone Networks, and Virtual LANs

2. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 2 16.1 Connecting Devices Repeaters Hubs Bridges Two-Layer Switches

3. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 3 Figure 16.1 Connecting devices

4. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 4 Figure 16.2 Repeater

5. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 5 A repeater connects segments of a LAN. Note:

6. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 6 A repeater forwards every frame; it has no filtering capability. Note:

7. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 7 A repeater is a regenerator, not an amplifier. Note:

8. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 8 Figure 16.3 Function of a repeater

9. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 9 Figure 16.4 Hubs

10. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 10 A bridge has a table used in filtering decisions. Note:

11. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 11 Figure 16.5 Bridge

12. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 12 A bridge does not change the physical (MAC) addresses in a frame. Note:

13. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 13 Figure 16.6 Learning bridge

14. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 14 Figure 16.7 Loop problem

15. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 15 Figure 16.8 Prior to spanning tree application

16. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 16 Figure 16.9 Applying spanning tree

17. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 17 Figure 16.10 Forwarding ports and blocking ports

18. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 18 16.2 Backbone Networks Bus Backbone Star Backbone Connecting Remote LANs

19. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 19 In a bus backbone, the topology of the backbone is a bus. Note:

20. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 20 Figure 16.11 Bus backbone

21. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 21 In a star backbone, the topology of the backbone is a star; the backbone is just one switch. Note:

22. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 22 Figure 16.12 Star backbone

23. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 23 Figure 16.13 Connecting remote LANs

24. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 24 A point-to-point link acts as a LAN in a remote backbone connected by remote bridges. Note:

25. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 25 16.3 Virtual LANs Membership Configuration IEEE Standard Advantages

26. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 26 Figure 16.14 A switch connecting three LANs

27. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 27 Figure 16.15 A switch using VLAN software

28. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 28 Figure 16.16 Two switches in a backbone using VLAN software

29. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 29 VLANs create broadcast domains. Note: