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Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
Chapter 2
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Chapter 2

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Transcript

  • 1. Chapter Overview <ul><li>Network Cables </li></ul><ul><li>Network Interface Adapters </li></ul><ul><li>Network Hubs </li></ul>
  • 2. Cable Topologies <ul><li>Bus </li></ul><ul><li>Star </li></ul><ul><li>Ring </li></ul><ul><li>Hierarchical star </li></ul><ul><li>Mesh </li></ul><ul><li>Wireless </li></ul>
  • 3. Bus Topology Bus Topology Bus Topology Failure
  • 4. Star Topology Star Topology
  • 5. Hierarchical Star Topology
  • 6. Ring Topology Ring Topology Ring Topology Failure
  • 7. Ring Network Types <ul><li>Physical ring </li></ul><ul><li>Logical ring </li></ul><ul><li>Double ring </li></ul>
  • 8. Mesh LAN Topology
  • 9. Mesh Internetwork
  • 10. Wireless Topologies <ul><li>Ad hoc topology: Connects two or more wireless computers communicating with each other only </li></ul><ul><li>Infrastructure network: Connects wireless computers communicating with a network access point that provides access to a standard cabled network </li></ul>
  • 11. Coaxial Cable
  • 12. Coaxial Cable Types BNC with a T-fitting N Connector Type 200 meters (Actually 185) 500 meter Max cable length Segment 0.195 inch 0.405 inch Thickness Thin Ethernet AKA 10Base2 Thick Ethernet AKA 10Base5 Application RG-58 RG-8   Thin Ethernet
  • 13. Twisted-Pair Cable
  • 14. UTP Cable Grades 1000Base-T (Gigabit Ethernet) Category 5e or higher 100Base-TX Fast Ethernet, Synchronous Optical Network (SONET), and Optical Carrier (OC3) Asynchronous Transfer Mode (ATM) Category 5 16-Mbps Token Ring Category 4 Voice-grade telephone networks, 10-Mbps Ethernet, 4-Mbps Token Ring, 100Base-T4 Fast Ethernet, and 100Base-VG-AnyLAN Category 3 Applications EIA/TIA Grade
  • 15. Fiber Optic Cable
  • 16. Fiber Optic Connectors
  • 17. Fiber Optic Cable Types <ul><li>Singlemode: Used for wide area networks (WANs) and other long cable runs </li></ul><ul><li>Multimode: Used for local area networks (LANs) and short cable runs </li></ul>
  • 18. Network Interface Adapters <ul><li>Called network interface cards (NICs) when installed in expansion slots </li></ul><ul><li>Provide the computer with an interface to the network </li></ul><ul><li>Usually take the form of an expansion card </li></ul><ul><li>Can be integrated into the motherboard </li></ul>
  • 19. Network Interface Adapter Functions <ul><li>Data encapsulation </li></ul><ul><li>Signal encoding and decoding </li></ul><ul><li>Data transmission and reception </li></ul><ul><li>Data buffering </li></ul><ul><li>Data-link protocol implementation </li></ul><ul><li>Serial/parallel conversion </li></ul><ul><li>Media Access Control (MAC) </li></ul>
  • 20. NIC Purchasing Checklist <ul><li>Does the NIC use the correct data-link layer protocol? </li></ul><ul><li>Does the NIC use the correct bus type? </li></ul><ul><li>Does the NIC have the correct cable connector? </li></ul>
  • 21. Installing a NIC <ul><li>To install a NIC into a standard expansion slot on a desktop computer: </li></ul><ul><li>1. Power off the computer. </li></ul><ul><li>2. Open the computer case. </li></ul><ul><li>3. Locate a free slot. </li></ul><ul><li>4. Remove the slot cover. </li></ul><ul><li>5. Insert the card into the slot. </li></ul><ul><li>6. Secure the card in the slot. </li></ul><ul><li>7. Close the computer case. </li></ul>NIC Installation
  • 22. Network Interface Adapter Requirements <ul><li>Network interface adapters use the following hardware resources:  </li></ul><ul><ul><li>An interrupt request (IRQ) </li></ul></ul><ul><ul><li>An input/output (I/O) port address </li></ul></ul><ul><ul><li>A memory address </li></ul></ul><ul><ul><li>A direct memory access (DMA) channel  </li></ul></ul><ul><li>Most network interface adapters require only an IRQ and an I/0 port address. </li></ul>
  • 23. Troubleshooting Network Interface Adapters <ul><li>Network interface adapters rarely malfunction. </li></ul><ul><li>Test all other networking components first. </li></ul><ul><li>Use the network interface adapter manufacturer’s diagnostics. </li></ul><ul><li>Replace network interface adapters rather than trying to repair them. </li></ul>
  • 24. Understanding Ethernet Hubs <ul><li>A hub connects all of the computers on a star or ring network. </li></ul><ul><li>Ethernet hubs are available in various sizes. </li></ul><ul><li>A hub creates a shared network medium on a LAN. </li></ul>
  • 25. Connecting Ethernet Hubs <ul><li>Most hubs have an uplink port. </li></ul><ul><li>Uplink ports provide a straight-through circuit. </li></ul><ul><li>To connect two hubs, plug a cable into the uplink port on one hub and into a standard port on the other hub. </li></ul>Play Video
  • 26. Understanding MAUs
  • 27. Chapter Summary <ul><li>The network topology is the pattern used to connect computers and other devices with the cable or other network medium. </li></ul><ul><li>The three primary LAN topologies are bus, star, and ring. </li></ul><ul><li>Unshielded twisted-pair (UTP) cable in the star topology is the most common network medium used today. </li></ul><ul><li>A network interface adapter provides the interface that enables a computer to connect to a network. </li></ul><ul><li>The network interface adapter and its driver implement the data-link layer protocol on the computer. </li></ul><ul><li>Hubs are devices that connect computers on a star or ring network. </li></ul>

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