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Network Devices

Date post: 19-Jan-2016
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Chapter 6. Network Devices. The network interface card. NIC or Network Adapter. This device provides the physical, electrical, and electronic connec-tions to the network media NIC connects to the computer through expansion slots or built in to the motherboard of the computer Features - PowerPoint PPT Presentation
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Page 1: Network Devices

LOGO

Page 2: Network Devices

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The network interface card

NIC or Network Adapter

Page 3: Network Devices

This device provides the physical, electrical, and electronic connec-tions to the network media

NIC connects to the computer through expansion slots or 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

Page 4: Network Devices

HUB

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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

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Switch

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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.

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Bridge

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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.

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Router

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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.

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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

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Gateways

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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.

Page 15: Network Devices

MODEMS

MODEM – MOdulation-DEModulation

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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.

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CSU/DSUs

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CSU/DSUs

Page 19: Network Devices

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

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