networks

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Networks
Stand alone computer
Is not connected to networks
All applications have to on the hard disk
Has to be connected to its own hardware such as printers and scanners
Data is stored on a hard disk or another external device
Advantage- user has sole use of the machine and not bandwidth restrictions
Disadvantage- no communication with other users
Networked computer
Computer connected to a network is called a workstation
Work station allow the sharing of information by:
-email
-Data files
-Instant messages
-Share hardware
-Online applications
Local area network (LAN)
One or two machines within a close geographical area such as home, school or work.
LAN peer to peer
Network not connected to a server
Home servers or small servers can be used for domestic use
Folders and files must be shared to other workstations
LAN Wireless access point (WAP)
If a wireless device is used there must be a wireless access point
Topology options
Star
Hub or switch at the centre, workstations surround it connected to the hub
by cables.

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Ring
All computers are connected to each other in a circle.
The data passes from one computer to the next all the way around the ring
until it reaches the destination computer
Bus
All workstations, printers and the file server are connected through one
single cable.
Signals move through the cables and at each end a terminator is fixed to
stop signals from bouncing back and forth.
LAN- characteristics
Computers that are networked are in the same area such as being in the
same building.…read more

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LAN shares computer data in a small area whereas WAN's share computer
data in a large area.
LAN for home sharing but a Wan is for large companies sharing.
Wan needs a external connection to connect computers together
WAN's use ISP (internet service providers) to transfer data and files
Virtual networks
Smaller part of LAN or WAN in which only specific machines can see each
other.…read more

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