1. Connecting LANs, Backbone Networks,
Chapter 16
Connecting LANs, Backbone Networks,
and Virtual LANs

2. Connecting Devices
Repeaters
Hubs
Bridges
Two-Layer Switches

3. Figure 16.1 Connecting devices

4. Figure Repeater

5. A repeater connects segments of a LAN.
Note:
A repeater connects segments of a LAN.

6. A repeater forwards every frame; it has no filtering capability.
Note:
A repeater forwards every frame; it has no filtering capability.

7. A repeater is a regenerator, not an amplifier.
Note:
A repeater is a regenerator, not an amplifier.

8. Figure 16.3 Function of a repeater

9. Figure Hubs

10. A bridge has a table used in filtering decisions.
Note:
A bridge has a table used in filtering decisions.

11. Figure Bridge

12. A bridge does not change the physical (MAC) addresses in a frame.
Note:
A bridge does not change the physical (MAC) addresses in a frame.

13. Figure 16.6 Learning bridge

14. Figure Loop problem

15. Figure 16.8 Prior to spanning tree application

16. Figure 16.9 Applying spanning tree

17. Figure 16.10 Forwarding ports and blocking ports

18. 16.2 Backbone Networks Bus Backbone Star Backbone
Connecting Remote LANs

19. In a bus backbone, the topology of the backbone is a bus.
Note:
In a bus backbone, the topology of the backbone is a bus.

20. Figure Bus backbone

21. Note:
In a star backbone, the topology of the backbone is a star; the backbone is just one switch.

22. Figure Star backbone

23. Figure 16.13 Connecting remote LANs

24. Note:
A point-to-point link acts as a LAN in a remote backbone connected by remote bridges.

25. Virtual LANs
Membership
Configuration
IEEE Standard
Advantages

26. Figure 16.14 A switch connecting three LANs

27. Figure 16.15 A switch using VLAN software

28. Figure 16.16 Two switches in a backbone using VLAN software

29. VLANs create broadcast domains.
Note:
VLANs create broadcast domains.