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  1. 1. Examining the Network
  2. 2. Overview <ul><li>Scope of Networks </li></ul><ul><li>Basic Connectivity Components </li></ul><ul><li>Network Topologies </li></ul><ul><li>Network Technologies </li></ul><ul><li>Expanding the Network </li></ul>
  3. 3. Scope of Networks Local Area Network Wide Area Network
  4. 4. <ul><li>Basic Connectivity Components </li></ul><ul><li>Network Adapters </li></ul><ul><li>Network Cables </li></ul><ul><li>Wireless Communication Devices </li></ul>
  5. 5. Network Adapters <ul><li>Receive data and convert it into electrical signals </li></ul><ul><li>Receive electrical signals and convert them into data </li></ul><ul><li>Determine if the data received is for a particular computer </li></ul><ul><li>Control the flow of data through the cable </li></ul>
  6. 6. Network Cables Types of Cables Coaxial ThinNet ThickNet 10Base2, 10Base5 Fiber-Optic Twisted-Pair Unshielded (UTP) Shielded (STP) 10BaseT
  7. 7. Wireless Communication Devices Wireless Communication Devices Narrowband Radio Transmission Infrared Transmission
  8. 8. <ul><li>Network Topologies </li></ul><ul><li>Bus Topology </li></ul><ul><li>Star Topology </li></ul><ul><li>Ring Topology </li></ul><ul><li>Mesh Topology </li></ul><ul><li>Hybrid Topologies </li></ul>
  9. 9. Bus Topology Terminator Segment Terminator
  10. 10. Star Topology Hub
  11. 11. Ring Topology
  12. 12. Hybrid Topologies Star-Bus Bus Star-Ring
  13. 13. <ul><li>Network Technologies </li></ul><ul><li>Ethernet </li></ul><ul><li>Token Ring </li></ul><ul><li>Asynchronous Transfer Mode (ATM) </li></ul><ul><li>Fiber Distributed Data Interface (FDDI) </li></ul><ul><li>Frame Relay </li></ul>
  14. 14. Ethernet Collision Detection Carrier Sense Multiple Access Detects signal Transmits signal Collision detected Characteristics Description Access Method CSMA/CD Transfer Speed Standard Ethernet – 10 Mbps Fast Ethernet – 100 Mbps Gigabit Ethernet – 1 Gbps (1000 Mbps)
  15. 15. Token Ring Characteristics Description Access Method Token passing Transfer Speed 4 to 16 Mbps for all cable types Physical Ring Logical Ring MSAU
  16. 16. Asynchronous Transfer Mode Characteristics Description Access Method Point-to-point. Transfers fixed-sized packets from one computer to another through ATM switching equipment Transfer Speed Fiber-optic at 155 Mbps to 622 Mbps ATM Switch ATM Switch ATM Switch Cell Cell
  17. 17. Fiber Distributed Data Interface Characteristics Description Access Method Token passing Transfer Speed Fiber-optic at 155 Mbps to 622 Mbps Primary Ring Secondary Ring
  18. 18. Frame Relay Main Office Branch Offices Frame Relay Network Frame Frame Frame Characteristics Access Method Transfer Speed Description Point-to-point Dependent upon transmittal capabilities of digital leased lines
  19. 19. <ul><li>Expanding the Network </li></ul><ul><li>Repeaters and Hubs </li></ul><ul><li>Bridges </li></ul><ul><li>Switches </li></ul><ul><li>Routers </li></ul><ul><li>Gateways </li></ul><ul><li>Remote Access Connectivity Types </li></ul><ul><li>Public Switched Telephone Network (PSTN) </li></ul><ul><li>Integrated Services Digital Network (ISDN) </li></ul><ul><li>X.25 </li></ul><ul><li>Asymmetric Digital Subscriber Line (ADSL) </li></ul>
  20. 20. Repeaters and Hubs Repeater Hub Repeater Transmits data to all connected computers Hub Transmits data to all connected computers in a star topology
  21. 21. Bridges Bridge
  22. 22. Switches Switch
  23. 23. Routers Router Router Router Router
  24. 24. Gateways Gateway Ethernet Token Ring
  25. 25. Remote Access Connectivity Types Dial-up Remote Access Remote Access Client Remote Access Server Virtual Private Network Remote Access Client Windows 2000 VPN Server Corporate Intranet Internet Tunnel
  26. 26. Public Switched Telephone Network (PSTN) Analog Modem Analog Modem Client Server <ul><li>Analog Voice Data </li></ul><ul><li>Worldwide Availability </li></ul><ul><li>Analog Modem </li></ul><ul><li>56 Kbps </li></ul>PSTN Telephone Wires
  27. 27. Integrated Services Digital Network (ISDN) ISDN Modem ISDN Modem ISDN Client Server <ul><li>International Communication Standard </li></ul><ul><li>Digital Transmission </li></ul><ul><li>Extends over Local Telephone Exchange </li></ul><ul><li>ISDN Modem </li></ul><ul><li>64 Kbps or Faster </li></ul>Digital Telephone Lines or Telephone Wires
  28. 28. X.25 Modem <ul><li>Based on Packet Switching </li></ul><ul><li>X.25 Packet Assembler/Disassembler (PAD) </li></ul><ul><li>Client Configuration </li></ul><ul><li>Server Configuration </li></ul>X.25 X.25 Smart Card Client Server PAD Service
  29. 29. Asymmetric Digital Subscriber Line (ADSL) LAN Adapter <ul><li>Copper Telephone Lines </li></ul><ul><li>Simultaneous Voice and Data Transmission </li></ul><ul><li>1.5 to 9 Mbps Downstream Rate </li></ul><ul><li>16 to 640 Kbps Upstream Rate </li></ul><ul><li>LAN Interface or Dial-up Interface </li></ul>ADSL LAN Adapter ATM Adapter ATM Adapter Client Server ADSL Wires
  30. 30. Lab A: Examining the Network Architecture
  31. 31. Review <ul><li>Scope of Networks </li></ul><ul><li>Basic Connectivity Components </li></ul><ul><li>Network Topologies </li></ul><ul><li>Network Technologies </li></ul><ul><li>Expanding the Network </li></ul>