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Network Topologies

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Jason Hando
Jason Hando
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Topology ,[object Object]
Network Topologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LAN Topologies ,[object Object]
LAN Topologies (cont’d) ,[object Object],Hub Host
LAN Topologies (Cont’d) ,[object Object]
LAN Topologies (Cont’d) ,[object Object]
Advantages and Disadvantages of Bus Topology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advantages and Disadvantages of Ring Topology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advantages and Disadvantages of Star Topology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
WAN Topologies ,[object Object],[object Object],[object Object],N1 N2 N3 N4 N6 N5
WAN Topologies (Cont’d) ,[object Object]
Data Link Layer ,[object Object],[object Object],[object Object],[object Object],[object Object]
Terminology ,[object Object],[object Object],[object Object],[object Object]
Data Link Layer: Sharing Medium In A LAN ,[object Object],[object Object],[object Object],[object Object]
Media Access Control Protocols ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MAC Control Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MAC Control Techniques (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ALOHA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Slotted Aloha ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
An Important Note ,[object Object]
CSMA (Carrier Sense Multiple Access) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CSMA/CD Carrier Sense Multiple Access/Collision Detection) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Collision Detection Mechanisms ,[object Object],[object Object],[object Object]
Backoff After Collision (Wait Time Calculation) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CSMA/CA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example Bus Network: Ethernet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Identifying A Destination ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ethernet Addressing ,[object Object],[object Object],[object Object],[object Object]
Ethernet Address Recognition ,[object Object],[object Object],[object Object],[object Object]
Possible Ways to Direct Frames ,[object Object],[object Object],[object Object],[object Object],[object Object]
Broadcast on Ethernet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Multicast on Ethernet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Promiscuous Mode ,[object Object],[object Object],[object Object]
Network Analyzer ,[object Object],[object Object],[object Object],[object Object],[object Object]
Identifying Frame Contents ,[object Object],[object Object],[object Object],[object Object]
Conceptual Frame Format ,[object Object],[object Object],[object Object],[object Object],[object Object],Payload Header
Example Ethernet Frame Format 8 6 6 2 46 - 1500 4 Preamble Dest. Addr. Src. Addr. Data In Frame CRC Frame Type Preamble: Alternating 1s and 0s. Used by receiver synchronization
Example Frame Types
When Network Hardware Does Not include Types ,[object Object],[object Object],[object Object],[object Object]
Handling Frames of Many Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Network Analyzer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
10Base2 Ethernet Wiring (Thinnet) ,[object Object]
Twisted Pair (10Base-T) Ethernet Wiring ,[object Object],Hub Twisted pair wiring RJ-45 connectors
IEEE 802.3 10-Mbps Ethernet Specifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IEEE 802.3 10-Mbps Ethernet Specifications (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IEEE 802.3 10-Mbps Ethernet Specifications (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IEEE 802.3 100-Mbps Fast Ethernet Specifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Token Ring ,[object Object],[object Object],[object Object],[object Object]
Token passing mechanism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advantages and Disadvantages of Token Passing Protocol ,[object Object],[object Object],[object Object],[object Object]
Token Maintenance Problems ,[object Object],[object Object],[object Object]
IEEE 802.5 Frame Format SD AC FC DA SA Data unit FCS ED FS 1 1 1 6 6 > 0 4 1 1 SD: starting delimiter SA: source address AC: access control FCS: frame check sequence FC: frame control ED: ending delimiter DA: destination address FS: frame status Bytes SD AC ED 1 1 1 A. General frame format B. Token frame format
IEEE 802.5 Frame Format (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Comparison of contention-based and token-passing protocols
Comparison of contention-based and token-passing protocols (cont’d)
Ring LANs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ring LAN Repeaters: States ,[object Object],[object Object],[object Object],[object Object],1-bit delay To station To station From station A. Listen state B. Transmit state C. Bypass state
Ring Problems ,[object Object],[object Object],[object Object],[object Object]
Star Topology: Example Networks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ARCNet Example Active Hub Passive Hub
Terminology: Hubs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LAN Summary
LAN Summary (Contd)

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Network Topologies

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  • 37. Example Ethernet Frame Format 8 6 6 2 46 - 1500 4 Preamble Dest. Addr. Src. Addr. Data In Frame CRC Frame Type Preamble: Alternating 1s and 0s. Used by receiver synchronization
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  • 52. IEEE 802.5 Frame Format SD AC FC DA SA Data unit FCS ED FS 1 1 1 6 6 > 0 4 1 1 SD: starting delimiter SA: source address AC: access control FCS: frame check sequence FC: frame control ED: ending delimiter DA: destination address FS: frame status Bytes SD AC ED 1 1 1 A. General frame format B. Token frame format
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  • 54. Comparison of contention-based and token-passing protocols
  • 55. Comparison of contention-based and token-passing protocols (cont’d)
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  • 60. ARCNet Example Active Hub Passive Hub
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