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Network Topologies

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Jason Hando
Jason Hando

The document discusses different network topologies including LAN and WAN topologies. It describes common LAN topologies like bus, ring, and star as well as WAN topologies like mesh and tree. It also discusses the data link layer and media access control protocols like CSMA/CD that are used to allow devices to share the transmission medium in a LAN.

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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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