Chapter 2 NETWORK CABLING Chapter 2 NETWORK CABLING
Chapter 2 NETWORK CABLING
Chapter 2: NETWORK CABLING TOPOLOGIES § § There are three main local area network (LAN) topologies: § Bus § Star § Ring Other network topologies include: § Mesh § Wireless 2
Chapter 2: NETWORK CABLING 3 BUS TOPOLOGY § The bus topology supports thick and thin coaxial segments. § Segments are connected by repeaters. § The bus topology uses the baseband signaling method. § Signals are broadcast in both directions simultaneously. § Both ends of each segment require termination to avoid reflection. § End systems connect to the segment in a linear manner.
Chapter 2: NETWORK CABLING THICK AND THIN COAXIAL BUS 4
Chapter 2: NETWORK CABLING 5 STAR TOPOLOGY § The star topology can use coaxial, twisted pair, or fiber optic cable. § A central device (hub) connects hubs and nodes to the network. § § Each node connects to its own dedicated port on the hub. § Hubs broadcast transmitted signals to all connected devices. § You can connect multiple hubs to form a hierarchical star topology. The star topology uses the baseband signaling method.
Chapter 2: NETWORK CABLING A SIMPLE STAR TOPOLOGY 6
Chapter 2: NETWORK CABLING A HIERARCHICAL STAR TOPOLOGY 7
Chapter 2: NETWORK CABLING 8 RING TOPOLOGY § The ring topology can use twisted pair or fiber optic cabling. § A central device (hub) connects hubs and nodes to the network. § Each node connects to its own dedicated port on the hub. § You can connect multiple hubs to form a larger ring. § The ring topology uses the baseband signaling method. § Frames are transmitted around the ring from node to hub to node. § Media Access Control (MAC) is used for token passing.
Chapter 2: NETWORK CABLING A RING NETWORK 9
Chapter 2: NETWORK CABLING MESH TOPOLOGY § Typically uses fiber optic cabling for redundant wide area network (WAN) links § Provides multiple paths to destinations for fault tolerance § Supports baseband broadband signals § Requires an enormous amount of cable 10
Chapter 2: NETWORK CABLING LAN MESH 11
Chapter 2: NETWORK CABLING ENTERPRISE MESH 12
Chapter 2: NETWORK CABLING 13 WIRELESS TOPOLOGY § Cell-based technology that uses unbounded media § Two wireless topologies: § Ad hoc § Infrastructure
Chapter 2: NETWORK CABLING AD HOC WLAN 14
Chapter 2: NETWORK CABLING INFRASTRUCTURE WLAN 15
Chapter 2: NETWORK CABLING LAN CABLE TYPES § Three cable types are used in LANs: § Coaxial § Twisted pair § Fiber optic 16
Chapter 2: NETWORK CABLING COAXIAL CABLE 17
Chapter 2: NETWORK CABLING AUI (ATTACHMENT UNIT INTERFACE) CABLE 18
Chapter 2: NETWORK CABLING THIN ETHERNET HARDWARE 19
Chapter 2: NETWORK CABLING UNSHIELDED TWISTED PAIR (UTP) CABLE 20
Chapter 2: NETWORK CABLING UTP CONNECTORS 21
Chapter 2: NETWORK CABLING UTP CABLE GRADES Category Frequency Primary Application 1 Up to 0 MHz Voice networks 2 Up to 1 MHz Voice and lowspeed data networks less than 4 Mbps 3 Up to 16 MHz Voice and data networks from 4 to 100 Mbps 4 Up to 20 MHz 16 -Mbps Token Ring 5 Up to 100 MHz 100 -Mbps Fast Ethernet 5 e Up to 100 MHz 1000 -Mbps 22
Chapter 2: NETWORK CABLING FIBER OPTIC CABLE 23
Chapter 2: NETWORK CABLING STRAIGHT TIP (ST) CONNECTOR 24
Chapter 2: NETWORK CABLING 25 STRAIGHT THROUGH AND CROSSOVER WIRING § Wiring within a twisted pair cable is configured as either § Straight through, where each wire (or pin) is attached to the same contact point at each end § Crossover, where transmit contacts on each end of the cable are connected to the receive contact at the other end
Chapter 2: NETWORK CABLING STRAIGHT THROUGH WIRING 26
Chapter 2: NETWORK CABLING CROSSOVER WIRING 27
Chapter 2: NETWORK CABLING 28 SUMMARY § The three basic LAN topologies are bus, star, and ring. WLANs are becoming more popular. Mesh networks are not typically used in LANs. § The primary cable types used in LANs are coaxial, twisted pair, and fiber optic.
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