chap11 - Data Network Connectivity Chapter 11 Objectives In...

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Data Network Connectivity Chapter 11
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Objectives In this chapter, you will learn to: Explain how NICs operate List the most common types of NICs Describe the purpose and operation of hubs and repeaters Describe the purpose and operation of bridges and switches Explain how routers connect dissimilar networks Identify other Layer 3 connectivity devices and understand their uses Describe how remote users can connect to a LAN or WAN via a modem Identify the components necessary for access and carrier network connectivity
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Network Interface Cards (NICs) Devices that act as transceivers for workstations, servers, connectivity devices, and peripherals on a network. Transmit data in a format that other network nodes can interpret. Receive and interpret encoded data from the network. Assemble data frames during transmission and disassemble data frames during reception.
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Adapter Card NICs A circuit board used to connect a device to the system board. Expansion slots - openings with multiple electrical contacts into which the adapter can be inserted. Bus - the circuit that is used by the system board to transmit data to the computer’s components.
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Adapter Card NICs
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PC Card NICs
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USB NICs
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Hubs
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Hubs
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Hubs
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Bridges
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Bridges Transparent bridging - a bridge begins polling a network to learn about its physical topology as soon as it is installed on the network. Spanning tree algorithm - a routine that can detect circular traffic patterns and modify the way multiple bridges work together, thus eliminating such patterns. Source-route bridging - a bridge polls the network to determine which path is best for a packet to travel from point A to point B. Translational bridging - the bridge not only forwards packets, but also translates packets between one logical topology and another.
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Data Switches
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Data Switches Advantages Switches offer greater security because they isolate one device’s traffic from another.
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This note was uploaded on 10/25/2009 for the course IT 300 taught by Professor Staff during the Spring '08 term at George Mason.

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chap11 - Data Network Connectivity Chapter 11 Objectives In...

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