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Network Devices

Chapter 6. Network Devices. The network interface card. NIC or Network Adapter. This device provides the physical, electrical, and electronic connections to the network media NIC connects to the computer through expansion slots or built in to the motherboard of the computer Features

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Network Devices

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  1. Chapter 6 Network Devices

  2. The network interface card • NIC or Network Adapter www.themegallery.com

  3. This device provides the physical, electrical, and electronic connections to the network media • NIC connects to the computer through expansion slotsor built in to the motherboard of the computer • Features • Data transmission network • Sends data to another computer in the form of bits 0 and 1. • Control data flow between computer and cable systems • Equipment is operating at the physical layer

  4. HUB

  5. Features • Any transmission received on one port will be rebroadcast to all the other ports in the hub. • Equipment is operating at the physical layer

  6. Switch

  7. Connects multiple segments of a network together. • Rebroadcasts anything it receives on one port to all the others. • The benefit of a switch over a hub is that the switch increases performance because it doesn’t suffer from the wasted bandwidth of the extra transmissions.

  8. Bridge

  9. Bridge • Network device that connects two similar network segments together. • The primary function of a bridge is to keep traffic separated on both sides of the bridge.

  10. Router

  11. Example for VPN • Virtual: Information within a private network is transported over a public network. • Private: The traffic is encrypted to keep the data confidential.

  12. Features • A network device that connects multiple, often dissimilar, network segments into an internetwork. • Can make intelligent decisions about how best to get network data to its destination • All routers can: • Connect dissimilar networks • Interpret Layer 3 addressing and other information • Determine the best path for data to follow • Reroute traffic

  13. Gateways

  14. Gateway allow connection types protocols together • For example: • Network of you use protocol IP Network and other network use a protocol IPX, Novell, DECnet, SNA ... or any protocol that you will Gateway convert from this type protocol to them “talk” together.

  15. MODEMS • MODEM – MOdulation-DEModulation

  16. MODEMS • A modem is a device that changes digital data into an analog form for transmission over an analog medium and then back to digital again at the receiving end.

  17. CSU/DSUs

  18. CSU/DSUs

  19. The Channel Service Unit/Data Service Unit (CSU/DSU) is a common device found in equipment rooms when the network is connected via a T-series data connection

  20. Summary

  21. www.themegallery.com

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