Networks

Networks

1. peer to peer

   • network of computers configured to allow certain files and folders to be shared with everyone or with selected users. Peer-to-peer networks are quite common in small offices that do not use a dedicated file server.
   • In its simplest form, a peer-to-peer (P2P) network is created when two or more PCs are connected and share resources without going through a separate server computer. A P2P network can be an ad hoc connection—a couple of computers connected via a Universal Serial Bus to transfer files

2. star network

   • In a star network each device on the network has its own cable that connects to a switch or hub. A hub sends every packet of data to every device, whereas a switch only sends a packet of data to the destination device.
   • ADVANTAGES- very reliable – if one cable or device fails then all the others will continue to work. high performing as no data collisions can occur
     • DISADVANTAGES- expensive to install as this type of network uses the most cable (network cable is expensive)

3. ring network

   • In a ring network each device (workstation, server, printer) is connected to two other devices, this forms a ring for the signals to travel around. Each packet of data on the network travels in one direction and each device receives each packet in turn until the destination device receives it.
   • ADVANTAGES-This type of network can transfer data quickly, even if there are a large number of devices connected because the data only flows in one direction, so there won’t be any data collisions.
     • DISADVANTAGES-If the main cable fails or any device is faulty then the whole network will fail.

4. bus network

   • In a bus network all the workstations, servers and printers are joined to one cable (the bus). At each end of the cable a terminator is fitted to stop signals reflecting back down the bus.
   • ADVANTAGES-easy to install and chea to install
     • disadvantages-if the main cable fails or gets damaged the whole network will fail

5. lan

   • A LAN covers a small area such as one site or building, eg a school or a college.
   • wan
     • A LAN covers a small area such as one site or building, eg a school or a college.