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NETWORK CONNECTION HARDWARE

Chapter 3. NETWORK CONNECTION HARDWARE. NETWORK INTERFACE ADAPTER. Provides the link between a computer and the network Requires a device driver to perform both data-link and physical layer functions Plugs into a bus slot or universal serial bus (USB) port on a computer

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NETWORK CONNECTION HARDWARE

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  1. Chapter 3 NETWORK CONNECTION HARDWARE

  2. Chapter 3: NETWORK CONNECTION HARDWARE NETWORK INTERFACE ADAPTER • Provides the link between a computer and the network • Requires a device driver to perform both data-link and physical layer functions • Plugs into a bus slot or universal serial bus (USB) port on a computer • Also referred to as a network interface card (NIC)

  3. Chapter 3: NETWORK CONNECTION HARDWARE A NETWORK INTERFACE ADAPTER

  4. Chapter 3: NETWORK CONNECTION HARDWARE TRANSMISSION FUNCTIONS • Network interface adapters perform the following functions during data transmission: • Data transfer, buffering, and encapsulation • Media Access Control (MAC) • Parallel/ serial conversion • Signal encoding and amplification

  5. Chapter 3: NETWORK CONNECTION HARDWARE HALF-DUPLEX AND FULL-DUPLEX MODES

  6. Chapter 3: NETWORK CONNECTION HARDWARE INSTALLING A NETWORK INTERFACE ADAPTER IN A COMPUTER To install a network interface adapter: • Physically insert the network interface adapter card into the slot. • Configure the card to use the appropriate hardware resources. • Install the card’s device driver.

  7. Chapter 3: NETWORK CONNECTION HARDWARE A NETWORK INTERFACE ADAPTER IN A COMPUTER

  8. Chapter 3: NETWORK CONNECTION HARDWARE NETWORK INTERFACE ADAPTER DEVICE DRIVERS • Network interfaces require a device driver to provide the link between the computer and the interface. • Operating systems ship with device drivers for common interfaces. • Operating systems that support PnP detect and configure the interface automatically. • You can get drivers from the manufacturer’s Web site. • The driver configuration must match the interface’s resource settings.

  9. Chapter 3: NETWORK CONNECTION HARDWARE TROUBLESHOOTING A NETWORK INTERFACE ADAPTER • To troubleshoot the suspect network interface adapter, open the computer case and do the following: • Verify that the interface is seated properly in the bus slot. • Remove the card, clean the slot, and then reseat the card in the same slot or try another slot. • Test a different interface (known to be functional) in the same slot and in a different slot

  10. Chapter 3: NETWORK CONNECTION HARDWARE HUBS, REPEATERS, AND CONCENTRATORS • Hubs, repeaters, and concentrators are all physical layer devices that • Amplify and repeat signals • Extend the distance of a network

  11. Chapter 3: NETWORK CONNECTION HARDWARE AN ETHERNET REPEATER

  12. Chapter 3: NETWORK CONNECTION HARDWARE 10BASE-T AND 100BASE-X HUBS • 10Base-T and 100Base-TX/100Base-T4 standards define Ethernet networks that function at 10 Mbps and 100 Mbps, using baseband signaling over twisted-pair wire. • 10Base-T • Maximum distance limitation for each connection: 100 meters, including workstation-to-hub and hub-to-hub connections • Can have up to four hubs connected to form a hierarchical star • Includes an internal crossover circuit • Uses an uplink port to form a hierarchical star

  13. Chapter 3: NETWORK CONNECTION HARDWARE 10BASE-T AND 100BASE-X HUBS (CONT.) • 100Base-TX and 100Base-T4 • There are two types of hubs: Class I and Class II. • The maximum distance for each node connection is 100 meters. • Class II hub-to-hub connections can be no more than 5 meters long.

  14. Chapter 3: NETWORK CONNECTION HARDWARE HUB CONNECTIONS

  15. Chapter 3: NETWORK CONNECTION HARDWARE 10BASE-T HUB

  16. Chapter 3: NETWORK CONNECTION HARDWARE ROUTERS Routers are network layer devices that connect LANs. • Connect similar or different data-link layer LANs • Must understand and support the network layer protocol and addressing • Perform fragmentation • Strip the data-link header and footer off received frames • Add a new data-link header and footer before transmitting frames • Use routing protocols to build routing tables and forward frames • Define separate broadcast domains

  17. Chapter 3: NETWORK CONNECTION HARDWARE A SIMPLE ROUTED NETWORK

  18. Chapter 3: NETWORK CONNECTION HARDWARE A ROUTED INTERNETWORK

  19. Chapter 3: NETWORK CONNECTION HARDWARE GATEWAYS • Can include the functions of all seven layers of the OSI model • Connect dissimilar systems and protocols • Perform translation and conversion services

  20. Chapter 3: NETWORK CONNECTION HARDWARE SUMMARY • Network interface adapters provide the physical link between computers and the network. • Hubs are physical layer devices that amplify and repeat signals out all ports except the one they were received through. • Routers are network layer devices that forward datagrams between LANs. • Gateways translate and convert protocols between dissimilar systems.

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