basic concepts and wired ethernet lans
DESCRIPTION
Basic Concepts and Wired Ethernet LANsTRANSCRIPT
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Basic Concepts andWired Ethernet LANs
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Figure 9-2A client-server modelwith a general server
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Figure 9-1A client-server model with dedicated servers
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Serverske uloge
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Figure 9-3Peer-to-peer model
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Figure 9-4Physical bus topology
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Terminirana mreza
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Neterminirana mreza
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Prekid jednog
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Figure 9-5Physical star topology
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Zvijezda
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The star topology is the dominant physical topology today.Note:
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Figure 9-6Logical bus topology
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In 1985, the Computer Society of the IEEE developed Project 802. It covers the first two layers of the Internet model.Note:
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Figure 9-7Logical star topology
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Technical Focus: Ring Topology
Another physical topology common at the beginning of the LAN era was the ring topology. In a ring topology, each station isconnected to the next station as shown in the following figure:
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Project 802 has split the data link layer into two different sublayers: logical link control (LLC) and media access control (MAC). Note:
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Figure 9-8LAN compared with the Internet model
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Figure 9-9Collision in CSMA/CD
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Kolizija
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Technical Focus: Ethernet Addressing
Each station on an Ethernet network (such as a PC, workstation, or printer) has its own network interface card (NIC). The NIC usually fits inside the station and provides the station with a 6-byte (48-bit) physical address.
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Figure 9-10Implementations of Ethernet
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Figure 9-11:aEthernet connection to the medium
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Figure 9-11:bEthernet connection to the medium
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Figure 9-11:cEthernet connection to the medium
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Figure 9-11:dEthernet connection to the medium
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Technical Focus: Ethernet Frame
Traditional Ethernet has a frame with the following format:
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Figure 9-12Switched Ethernet
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Figure 9-13Fast Ethernet implementations
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Figure 9-14:aFast Ethernet connection to the medium
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Figure 9-14:bFast Ethernet connection to the medium
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Figure 9-14:cFast Ethernet connection to the medium
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Figure 9-15Gigabit Ethernet implementations
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Figure 9-16:aGigabit Ethernet connection to the medium
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Figure 9-16:bGigabit Ethernet connection to the medium
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