network topologies, protocols and layers 02

network topologies, protocols and layers 02

1. most computers and devices are connected together via networks but how and why?????????

   • a computer network is a number of computers linked together to allow them to share resources. Networked computers can share hardware, software and data -bbc bitesize
   • a mesh network
     • where some or all of the workstations or other devices are connected directly to each other. Most are usually connected to the node that they exchange the most data with
   • a star network
     • in a star network, each device is connected by an individual cable directly to the server. Star networks are usually the layout of choice in schools and offices because they tend to be the most reliable of the topologies
   • wifi???
     • wifi is wireless frequency also radio waves are used to transmit data packets without the need for wires
       • this method is slower and more vulnerable to attack but it removes the need for cabling and networks, this means that it can be set in remote locations such as in vehicles, in parks or on planes etc