Chapter 16

Chapter 16 Connecting LANs,Backbone Networks, and Virtual LANs

16.1 Connecting Devices Repeaters Hubs Bridges Two-Layer Switches

Figure 16.1Connecting devices

Figure 16.2Repeater

Note: A repeater connects segments of a LAN.

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

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

Figure 16.3Function of a repeater

Figure 16.4Hubs

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

Figure 16.5Bridge

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

Figure 16.6Learning bridge

Figure 16.7Loop problem

Figure 16.8Prior to spanning tree application

Figure 16.9Applying spanning tree

Figure 16.10Forwarding ports and blocking ports

16.2 Backbone Networks Bus Backbone Star Backbone Connecting Remote LANs

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

Figure 16.11Bus backbone

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

Figure 16.12Star backbone

Figure 16.13Connecting remote LANs

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

16.3 Virtual LANs Membership Configuration IEEE Standard Advantages

Figure 16.14A switch connecting three LANs

Figure 16.15A switch using VLAN software

Figure 16.16Two switches in a backbone using VLAN software

Note: VLANs create broadcast domains.

Chapter 16

Chapter 16

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Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

Chapter 16

CHAPTER 16

Chapter 16

CHAPTER 16

Chapter 16

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Chapter 16:

Chapter 16

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