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LOGO
The network interface card
NIC or Network Adapter
www.themegallery.com
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
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
All routers can:
Connect dissimilar networks
Interpret Layer 3 addressing and other information
Determine the best path for data to follow
Reroute traffic
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
Summary
LAYER
DEVICES
Application, Presentation, Session
No
Transport
No
Network
Router
Data link
Bridges, Intelligent hubs
Physical
NIC, Repeater,
Concentrator, Hub,
connector, MODEM
LOGO
www.themegallery.com