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Gnall1 OSI Layer 1 Topology. Gnall Transmission Media 2Tamara Dean: Network+ Guide to Networks.

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Presentation on theme: "Gnall1 OSI Layer 1 Topology. Gnall Transmission Media 2Tamara Dean: Network+ Guide to Networks."— Presentation transcript:

1 Gnall1 OSI Layer 1 Topology

2 Gnall Transmission Media 2Tamara Dean: Network+ Guide to Networks

3 Gnall BNC Connector - Thinnet RG-58A/U 3http://www.the-idle-monk.co.uk/hoard/ethernet/physical.html

4 Gnall DB-9 Connector / Vampire Tap - Thicknet RG-8 4http://www.the-idle-monk.co.uk/hoard/ethernet/physical.html

5 Gnall RJ-45 and RJ-11 Connectors RJ = "Registered Jack" RJ-45:8 pinsCAT RJ-11:2 - 6 pinstelephone 5Tamara Dean: Network+ Guide to Networks

6 Gnall PCI NIC

7 GnallJean Andrews: A+ Guide To Managing and Maintaining Your PC NIC

8 Gnall Netgear EN104TP 4-Port 10 Mbps Ethernet Hub RJ-45 with Uplink Button 8 Uplink/dp/B00000J4M9/ref=sr_1_4?s=electronics&ie=UTF8&qid= &sr=1-4&keywords=ethernet+hub

9 Gnall Attenuation and Noise 9Jean Andrews: A+ Guide to Managing and Maintaining Your PC

10 GnallTamara Dean: Network+ Guide to Networks Cable Management Patch Panel Punch-down Block

11 Gnall Cable Management Careful attention to the cable plant gives fewer physical layer network problems. Pay careful attention to cable fabrication and cable installation techniques. A cable which is working fine at 10 Mbps may not work well at 100 Mbps. Use patch panels and punch down blocks to break up and organize cable runs. TIA/EIA 568 Commercial Building Wiring Standard.

12 GnallTamara Dean: Network+ Guide to Networks Fiber Optic Cable Structure Glass Core Glass Cladding Plastic Casing Kevlar Plastic Sheath fibers / cable 12 (see pg 124 in Roberts text)

13 GnallTamara Dean: Network+ Guide to Networks Fiber Connector Types (SM & MM) ST - Straight TipSC - Subscriber/Standard Connector LC - Local ConnectorMT-RJ - Mechanical Transfer Registered Jack SC, ST- Existing fiber networks LC, MT-RJ- Newer fiber networks - Smaller size allows higher density of connections at termination point FC- see pg 135 in Roberts text 13

14 Gnall Fiber Optic Connectors 14http://webpage.pace.edu/ms16182p/networking/cables.html

15 Gnall TOSLink Optical Digital Audio Cable 15http://www.kenable.co.uk/product_info.php?products_id=1848

16 Gnall Duplex Fiber 16http://webpage.pace.edu/ms16182p/networking/cables.html

17 Gnall Topologies Basic physical topologies: –Bus –Mesh –Star –Ring –Hybrid

18 GnallTamara Dean: Network+ Guide to Networks Topologies

19 Gnall Bus Topology (Co-axial) 19

20 Gnall Physical Bus Topology Traditionally Thinnet or Thicknet coaxial cable Signal propagates in both directions from the point of origin Requires 50-ohm termination transistors to prevent signal bounce Good –Least amount of cabling - inexpensive to set up Bad –Only one communication channel, thus every node shares the bus's total capacity - network performance degrades as nodes are added –Rarely practical for networks with more than a dozen nodes –Highly susceptible to single element failure 20http://www.houseofhum.com/stephen/library/network_primer/toc.html

21 Gnall Mesh Topology 21

22 Gnall Redundant Switches

23 Gnall Ring Topology 23

24 Gnall Ring Topology 24

25 Gnall Star Topology 25

26 Gnall Physical Topology Logical Topology ? Physical Topology –Physical pattern formed by physical layout of media and connectivity devices Logical Topology –Pattern formed by the flow of data packets, how data flows from device to device Consider a physical star / logical ring configuration 26

27 Gnall Hybrid Bus-Star Topology 27

28 GnallJean Andrews: A+ Guide To Managing and Maintaining Your PC Distributed Backbone Topology Co-ax bus with TP star branches

29 Gnall29 Bus-Star Topology with Switches

30 Gnall WiFi 30

31 Gnall31

32 Gnall Hub vs. Switch Hub –Only one transmission at a time –Single collision domain –Packet is sent to all ports Switch –Simultaneous transmissions without collisions –Creates multiple collision domains –Packet is sent to a single port 32http://cc.concord.edu/Networking/networking.htm

33 Gnall Stackable Hubs


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