Qualification > Miscellaneous
All ICT doubts here!
The Golden Girl =D:
--- Quote from: 6394 on May 13, 2010, 05:03:09 pm ---bt chk out this
http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networksrev5.shtml
it says in disadv sat the whole network fails if something happens 2 one compu
i thnk dat it will fail
--- End quote ---
wallah ur signature is soo gd mashAllah ..oo allah yisma3 minik !!
6394:
--- Quote from: princess12 on May 13, 2010, 05:01:41 pm --- Phased implementation
Phased implementation involves the introduction of the new system one part at a time. Eg: production of invoices is done by the new system while the payroll and processing orders are done by the old one. Step by step each aspect is moved to the new one.
--- End quote ---
but isnt dat pilot running
????????
zioziozio:
--- Quote from: ksitna on May 13, 2010, 05:03:54 pm ---
ppl help me please
--- End quote ---
A hub is a device that connects a number of computers together to make a LAN.
The typical use of a hub is at the centre of a star network (or as part of a hybrid network) - the hub has cables plugged into it from each computer. A hub is a ‘dumb’ device: if it receives a message, it sends it to every computer on the network. This means that hub-based networks are not very secure - everyone can listen in to communications. Hubs are pretty much obsolete now (you can't buy them any more), having been superseded by cheap switches.A switch, like a hub, is a device that connects a number of computers together to make a LAN.
The typical use of a switch is at the centre of a star network (or as part of a hybrid network) - the switch has cables plugged into it from each computer.
A switch is a more ‘intelligent’ device than a hub: if it receives a message, it checks who it is addressed to, and only sends it to that specific computer. Because of this, networks that use switches are more secure than those that use hubs, but also a little more expensive.
A proxy server is a computer setup to share a resource, usually an Internet connection.
A router is a device that interconnects two or more computer networks, and selectively interchanges packets of data between them.
zioziozio:
--- Quote from: 6394 on May 13, 2010, 05:01:06 pm ---oh ya u noe wat u hve got a point nw
*CLEVER*
--- End quote ---
Looll Thanks ;D
6394:
--- Quote from: ksitna on May 13, 2010, 05:03:54 pm ---
ppl help me please
--- End quote ---
i noe btwn switch n hub
hub is less secure dan switch
bcoz hub does nt read any of the data in the packets which arrive from a computer but just sends them onto all the computers on the netwoerk
whereas a switch send the data packets directly to its destination!!!!!!
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