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1© 2004, Cisco Systems, Inc. All rights reserved.
CCNA 1 v3.1 Module 8 Ethernet Switching
Claes Larsen, CCAI
222© 2004, Cisco Systems, Inc. All rights reserved.
Objectives
333© 2004, Cisco Systems, Inc. All rights reserved.
Layer 2 Bridging
444© 2004, Cisco Systems, Inc. All rights reserved.
Bridges
555© 2004, Cisco Systems, Inc. All rights reserved.
Switch Operation
666© 2004, Cisco Systems, Inc. All rights reserved.
Full Duplex
777© 2004, Cisco Systems, Inc. All rights reserved.
Network Latency
888© 2004, Cisco Systems, Inc. All rights reserved.
Switch Modes
• Store and Forward - A switch receives the entire frame before sending it out the destination port.
• Cut-Through - A switch starts to transfer the frame as soon as the destination MAC address is received.
999© 2004, Cisco Systems, Inc. All rights reserved.
Spanning-Tree Operation
101010© 2004, Cisco Systems, Inc. All rights reserved.
STP States
111111© 2004, Cisco Systems, Inc. All rights reserved.
Types of Networks
121212© 2004, Cisco Systems, Inc. All rights reserved.
Collisions in Collision Domain
131313© 2004, Cisco Systems, Inc. All rights reserved.
Collision Domain Segmentation
141414© 2004, Cisco Systems, Inc. All rights reserved.
Increasing a Collision Domain
151515© 2004, Cisco Systems, Inc. All rights reserved.
Four Repeater Rule
161616© 2004, Cisco Systems, Inc. All rights reserved.
Round-Trip Delay Calculation
171717© 2004, Cisco Systems, Inc. All rights reserved.
Layer 1 Devices Extend Collision Domains
181818© 2004, Cisco Systems, Inc. All rights reserved.
Limiting the Collision Domains
191919© 2004, Cisco Systems, Inc. All rights reserved.
Segmenting a Collision Domain with a Bridge
202020© 2004, Cisco Systems, Inc. All rights reserved.
Broadcasts in a Bridged Environment
212121© 2004, Cisco Systems, Inc. All rights reserved.
Effects of Broadcast Radiation on Hosts in a IP Network
222222© 2004, Cisco Systems, Inc. All rights reserved.
Average Number of Broadcasts and Multicasts for IP
232323© 2004, Cisco Systems, Inc. All rights reserved.
Broadcast Domain Segmentation
242424© 2004, Cisco Systems, Inc. All rights reserved.
Data Flow Through a Network
252525© 2004, Cisco Systems, Inc. All rights reserved.
Segments
262626© 2004, Cisco Systems, Inc. All rights reserved.
Summary