CHAPTER LAN Topology Chapter Objectives Describe the characteristics of differen

CHAPTER LAN Topology Chapter Objectives Describe the characteristics of differen www.phwiki.com

CHAPTER LAN Topology Chapter Objectives Describe the characteristics of differen

Fisher, Anne, Managing Editor has reference to this Academic Journal, PHwiki organized this Journal CHAPTER LAN Topology Chapter Objectives Describe the characteristics of different LAN topologies Bus, ring, star in addition to mixed topologies Compare in addition to contrast the topologies with one another with respect to their relative advantages in addition to disadvantages Chapter Modules Topology: The Bus LAN Bus LAN Practical Implementations Topology: The Ring LAN Ring LAN Practical Implementation Topology: The Star LAN Topology: Mixed Topologies

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END OF Chapter Introduction MODULE The Bus Topology Questions What are physical in addition to logical topologies What is a collision domain How can the bus network be implemented in practice How is it frequently implemented in practice How could collisions be reduced Is it possible to reduce the danger of a cable breakdown Explain.

Bus Network Workstation Workstation Server Peripheral Device Printer Single Data Bus Bus LAN Transmission Logic Listen to the bus as long as traffic If no traffic is detected, then transmit Otherwise, if the bus is busy with traffic, wait as long as a r in addition to om period of time be as long as e attempting to transmit again Repeated attempts will be made until the bus is found free Collision of Data Two workstations may find the bus free at the same time Both would transmit at the same time Collision of data occurs Both workstations will now wait as long as a r in addition to om period of time be as long as e attempting to transmit again

Advantages of Bus LAN Cabling is simple in addition to easy to install in a local setup Based on well established st in addition to ards IEEE 802.3 Also known as the Ethernet st in addition to ard Disadvantages of a Bus LAN Sharing of a single data bus When the traffic increases the per as long as mance deteriorates Waiting period may reach unacceptable lengths of time under heavy data traffic Cable fault results in the entire LAN becoming inoperative Solution Collision domains are present only when a hub used Using switches will eliminate the collision domains

Advantage of Using a Switch WS2 WS1 WS3 Switch LAN 1 (Collision Domain 1) LAN 2 (Collision Domain 2) Occasional Crossover Traffic Practical Consideration All popular logical bus networks currently implemented using switches In Summary The use of switches in a . network reduces network traffic congestion Increases the utilization of the bus network

END OF MODULE MODULE Bus LAN Practical Implementation: 10Base2 Logical in addition to Physical Topology Logical topology Logical functioning of a network Physical topology Physical configuration of a network Example: For ease of implementation, a logical bus network may be physically configured as a star network

Major Bus Implementation Architectures 10Base2 10Base5 10BaseT 100BaseTX 1000BaseT Although this represents a logical bus topology, it is implemented physically in the as long as m of a star topology Topologies 10Base2 in addition to 10Base5 Logical bus in addition to Physical bus 10BaseT Logical bus in addition to Physical star 100BaseTx Logical bus in addition to physical star Fast Ethernet LAN 10Base2 10 Mbps LAN Based on a well established st in addition to ard Ethernet 802.3 st in addition to ard Configured using thin coaxial cables Sometimes called the 10Base2 cables Very popular in the past In recent times, the popularity has declined Due to emergence of fast Ethernet Due to the popularity of 100BaseTX

Components as long as Building a 10Base2 Network Thin coaxial cable T connector Terminator Network Interface Card A Typical Installation Expansion Slots T Connector Thin Coaxial Cable Terminator BNC Jack Practical Implementation Source: Black Box

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END OF MODULE MODULE Bus LAN Practical Implementation: 10Base5 10Base5 10 Mbps It is also based on a popular st in addition to ard known as the Ethernet 802.3 st in addition to ard Thick coaxial cables are used as long as configuring the network in this case The cables are less maneuverable In practice, the 10Base5 network is often used as a feeder connection to 10Base2 in addition to /or other types of networks

A Simple Implementation Transceiver Transceiver Client Server Vampire Clamp 15-pin AUI Connector Thick Coax (10Base5) A Practical Implementation Source: Black Box 10Base5 Feeder Connection 10Base 5 Feeder Line Source: Black Box 10Base2 Clusters

END OF MODULE END OF MODULE END OF CHAPTER

Fisher, Anne Managing Editor

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