CISCO NETWORKING ACADEMY Chabot College ELEC 99.05 Network Topologies & Connections.

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Presentation transcript:

CISCO NETWORKING ACADEMY Chabot College ELEC Network Topologies & Connections

CISCO NETWORKING ACADEMY Toplogies and Connections Differing physical topologies yield equivalent ethernet traffic at the workstation. For UTP connections, cable type depends on the types of devices connected.

CISCO NETWORKING ACADEMY Bus Topology

CISCO NETWORKING ACADEMY Extended Star Topology

CISCO NETWORKING ACADEMY Equivalent Ethernets

CISCO NETWORKING ACADEMY Crossover Cable Transmit pair “crosses over” to Receive pair.

CISCO NETWORKING ACADEMY Crossover Cable Connects NIC to NIC. Connects hub to hub.

CISCO NETWORKING ACADEMY Straight-Through Cable Connects NIC to hub.

CISCO NETWORKING ACADEMY Straight-Through Cable When connecting two PCs via a hub, straight-through cables are used. Where does the crossover occur? In the hub!

CISCO NETWORKING ACADEMY Cabling Example

CISCO NETWORKING ACADEMY Hub Feature Most hubs have a special “uplink port” that can be switched from crossover to straight-through function. Usually, the uplink is port 1. The uplink allows use of straight- through cables throughout all connections.

CISCO NETWORKING ACADEMY Hubs with Uplink

CISCO NETWORKING ACADEMY Quiz NIC to NIC - what type cable? Crossover NIC to hub - what type cable? Straight-through

CISCO NETWORKING ACADEMY Quiz Hub to hub - what type cable?? Crossover Hub uplink port to hub - what type cable? Straight-through

CISCO NETWORKING ACADEMY Quiz On most hubs, which port is the hub uplink on? Port 1 Could I attach a workstation NIC to the uplink port? Sure - just use a regular straight-through cable. If necessary, change the setting on the uplink port switch!

CISCO NETWORKING ACADEMY Quiz How can I tell if the hub’s uplink port switch is set correctly for the type of cable & device attached? Look for link light!