Network Devices
description
Transcript of Network Devices
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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 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
HUB
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
Switch
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.
Bridge
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.
Router
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.
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
Gateways
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.
MODEMS
MODEM – MOdulation-DEModulation
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.
CSU/DSUs
CSU/DSUs
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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