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Network Hardwares Felicitas Henry & Silke Salas Seber - Coggle Diagram
Network Hardwares
Felicitas Henry & Silke Salas Seber
Devices
Modem
Transmition
Digital signal to analogue (& reverse)
Connect to internet
Hubs
Connected devices
Form a LAN
Date packet
Switches
efficiently than hubs
Distribute data packets
Each device has a MAC
Bridge
Connect LANs
Router
Enable data packets
Different networks
Transmition
Types of Networks
LAN (Local Area Network)
Advantajes
Sharing resources
Communication
Administrator
Disadvantages
Spread of virus
Slow access to Networks
High security risk
Main server down results in networks not functioning
WAN (Wide Area Networks)
Computer or Networks are far away
LANs joined together
End systems & intermediate systems
WLANs (Wireless LANs)
Access points
Uninterrupted wireless communications
Spread spectrum technology (wide range)
Infrared (short range)
No wires or cables
MAN (Metropolitan Area Networks)
City or state
Internet , Intranet, Extranet
INTERNERT
Provides network connections that link computers together
INTRANET
Private network that provides similar services to internet.
EXTRANET
A private network that allows access to business information
Network Topologies
BUS
Long central cable that connect all comuters
RING
Each computer is connected to a loop of cable
STAR
Each computer is connnected to a central device which passes messages
HYBRID
It combines more than one of the above basic topologies
Network concepts
ADVANTAGES
Store data centrally
Sharing: Files, data,resources
Communicate
Central settings
Connected to internet we can...text
Entretain
Use online services
Find information
Join online comunity
WHAT IS IT
Two or more computers connected at once.
DISADVANTAGES
Easily attacked by virus
Weak to hackers
if it breaks the tasks are difficult
Connected to the internet be careful of..
Revealing personal info
Avoid questionable websites (malware)
Info not always reliable